initial commit

.gitignore

@@ -0,0 +1,407 @@
+Ref/*.snk
+
+# globs
+Makefile.in
+*.userprefs
+*.usertasks
+config.make
+config.status
+aclocal.m4
+install-sh
+autom4te.cache/
+*.tar.gz
+tarballs/
+test-results/
+
+# Mac bundle stuff
+*.dmg
+*.app
+
+# content below from: https://github.com/github/gitignore/blob/main/Global/macOS.gitignore
+# General
+.DS_Store
+.AppleDouble
+.LSOverride
+
+# Icon must end with two \r
+Icon
+
+
+# Thumbnails
+._*
+
+# Files that might appear in the root of a volume
+.DocumentRevisions-V100
+.fseventsd
+.Spotlight-V100
+.TemporaryItems
+.Trashes
+.VolumeIcon.icns
+.com.apple.timemachine.donotpresent
+
+# Directories potentially created on remote AFP share
+.AppleDB
+.AppleDesktop
+Network Trash Folder
+Temporary Items
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+
+# content below from: https://github.com/github/gitignore/blob/main/Global/Windows.gitignore
+# Windows thumbnail cache files
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+# Dump file
+*.stackdump
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+[Dd]esktop.ini
+
+# Recycle Bin used on file shares
+$RECYCLE.BIN/
+
+# Windows Installer files
+*.cab
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+# content below from: https://github.com/github/gitignore/blob/master/VisualStudio.gitignore
+## Ignore Visual Studio temporary files, build results, and
+## files generated by popular Visual Studio add-ons.
+##
+## Get latest from https://github.com/github/gitignore/blob/master/VisualStudio.gitignore
+
+# User-specific files
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+
+# User-specific files (MonoDevelop/Xamarin Studio)
+*.userprefs
+
+# Build results
+[Dd]ebug/
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+[Rr]eleases/
+x64/
+x86/
+bld/
+[Bb]in/
+[Oo]bj/
+[Ll]og/
+
+# Visual Studio 2015/2017 cache/options directory
+.vs/
+# Uncomment if you have tasks that create the project's static files in wwwroot
+#wwwroot/
+
+# Visual Studio 2017 auto generated files
+Generated\ Files/
+
+# MSTest test Results
+[Tt]est[Rr]esult*/
+[Bb]uild[Ll]og.*
+
+# NUNIT
+*.VisualState.xml
+TestResult.xml
+
+# Build Results of an ATL Project
+[Dd]ebugPS/
+[Rr]eleasePS/
+dlldata.c
+
+# Benchmark Results
+BenchmarkDotNet.Artifacts/
+
+# .NET Core
+project.lock.json
+project.fragment.lock.json
+artifacts/
+
+# StyleCop
+StyleCopReport.xml
+
+# Files built by Visual Studio
+*_i.c
+*_p.c
+*_h.h
+*.ilk
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+*.obj
+*.iobj
+*.pch
+*.pdb
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+*.pgd
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+*.tlh
+*.tmp
+*.tmp_proj
+*_wpftmp.csproj
+*.log
+*.vspscc
+*.vssscc
+.builds
+*.pidb
+*.svclog
+*.scc
+
+# Chutzpah Test files
+_Chutzpah*
+
+# Visual C++ cache files
+ipch/
+*.aps
+*.ncb
+*.opendb
+*.opensdf
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+*.cachefile
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+
+# Visual Studio profiler
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+*.sap
+
+# Visual Studio Trace Files
+*.e2e
+
+# TFS 2012 Local Workspace
+$tf/
+
+# Guidance Automation Toolkit
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+
+# ReSharper is a .NET coding add-in
+_ReSharper*/
+*.[Rr]e[Ss]harper
+*.DotSettings.user
+
+# JustCode is a .NET coding add-in
+.JustCode
+
+# TeamCity is a build add-in
+_TeamCity*
+
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+
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+.axoCover/*
+!.axoCover/settings.json
+
+# Visual Studio code coverage results
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+
+# NCrunch
+_NCrunch_*
+.*crunch*.local.xml
+nCrunchTemp_*
+
+# MightyMoose
+*.mm.*
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+
+# Web workbench (sass)
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+
+# Installshield output folder
+[Ee]xpress/
+
+# DocProject is a documentation generator add-in
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+DocProject/Help/*.HxT
+DocProject/Help/*.HxC
+DocProject/Help/*.hhc
+DocProject/Help/*.hhk
+DocProject/Help/*.hhp
+DocProject/Help/Html2
+DocProject/Help/html
+
+# Click-Once directory
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+
+# Publish Web Output
+*.[Pp]ublish.xml
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+# Note: Comment the next line if you want to checkin your web deploy settings,
+# but database connection strings (with potential passwords) will be unencrypted
+*.pubxml
+*.publishproj
+
+# Microsoft Azure Web App publish settings. Comment the next line if you want to
+# checkin your Azure Web App publish settings, but sensitive information contained
+# in these scripts will be unencrypted
+PublishScripts/
+
+# NuGet Packages
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+# The packages folder can be ignored because of Package Restore
+**/[Pp]ackages/*
+# except build/, which is used as an MSBuild target.
+!**/[Pp]ackages/build/
+# Uncomment if necessary however generally it will be regenerated when needed
+#!**/[Pp]ackages/repositories.config
+# NuGet v3's project.json files produces more ignorable files
+*.nuget.props
+*.nuget.targets
+
+# Microsoft Azure Build Output
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+
+# Microsoft Azure Emulator
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+# Windows Store app package directories and files
+AppPackages/
+BundleArtifacts/
+Package.StoreAssociation.xml
+_pkginfo.txt
+*.appx
+
+# Visual Studio cache files
+# files ending in .cache can be ignored
+*.[Cc]ache
+# but keep track of directories ending in .cache
+!*.[Cc]ache/
+
+# Others
+ClientBin/
+~$*
+*~
+*.dbmdl
+*.dbproj.schemaview
+*.jfm
+*.pfx
+*.publishsettings
+orleans.codegen.cs
+
+# Including strong name files can present a security risk
+# (https://github.com/github/gitignore/pull/2483#issue-259490424)
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+
+# Since there are multiple workflows, uncomment next line to ignore bower_components
+# (https://github.com/github/gitignore/pull/1529#issuecomment-104372622)
+#bower_components/
+
+# RIA/Silverlight projects
+Generated_Code/
+
+# Backup & report files from converting an old project file
+# to a newer Visual Studio version. Backup files are not needed,
+# because we have git ;-)
+_UpgradeReport_Files/
+Backup*/
+UpgradeLog*.XML
+UpgradeLog*.htm
+ServiceFabricBackup/
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+# SQL Server files
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+*.ndf
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+# Business Intelligence projects
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+*.bim_*.settings
+*.rptproj.rsuser
+
+# Microsoft Fakes
+FakesAssemblies/
+
+# GhostDoc plugin setting file
+*.GhostDoc.xml
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+.ntvs_analysis.dat
+node_modules/
+
+# Visual Studio 6 build log
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+# Visual Studio LightSwitch build output
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+**/*.Server/ModelManifest.xml
+_Pvt_Extensions
+
+# Paket dependency manager
+.paket/paket.exe
+paket-files/
+
+# FAKE - F# Make
+.fake/
+
+# JetBrains Rider
+.idea/
+*.sln.iml
+
+# CodeRush personal settings
+.cr/personal
+
+# Python Tools for Visual Studio (PTVS)
+__pycache__/
+*.pyc
+
+# Cake - Uncomment if you are using it
+# tools/**
+# !tools/packages.config
+
+# Tabs Studio
+*.tss
+
+# Telerik's JustMock configuration file
+*.jmconfig
+
+# BizTalk build output
+*.btp.cs
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+*.xsd.cs
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+# OpenCover UI analysis results
+OpenCover/
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+# Azure Stream Analytics local run output
+ASALocalRun/
+
+# MSBuild Binary and Structured Log
+*.binlog
+
+# NVidia Nsight GPU debugger configuration file
+*.nvuser
+
+# MFractors (Xamarin productivity tool) working folder
+.mfractor/
+
+# Local History for Visual Studio
+.localhistory/

Gallery.Share/App.xaml

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+<?xml version="1.0" encoding="utf-8" ?>
+<Application xmlns="http://xamarin.com/schemas/2014/forms"
+             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
+             x:Class="Gallery.App">
+    <!--
+        Define global resources and styles here, that apply to all pages in your app.
+    -->
+    <Application.Resources>
+        <ResourceDictionary>
+            <Color x:Key="Primary">#2196F3</Color>
+            <Style TargetType="Button">
+                <Setter Property="TextColor" Value="White"></Setter>
+                <Setter Property="VisualStateManager.VisualStateGroups">
+                    <VisualStateGroupList>
+                        <VisualStateGroup x:Name="CommonStates">
+                            <VisualState x:Name="Normal">
+                                <VisualState.Setters>
+                                    <Setter Property="BackgroundColor" Value="{StaticResource Primary}" />
+                                </VisualState.Setters>
+                            </VisualState>
+                            <VisualState x:Name="Disabled">
+                                <VisualState.Setters>
+                                    <Setter Property="BackgroundColor" Value="#332196F3" />
+                                </VisualState.Setters>
+                            </VisualState>
+                        </VisualStateGroup>
+                    </VisualStateGroupList>
+                </Setter>
+            </Style>
+        </ResourceDictionary>        
+    </Application.Resources>
+</Application>

Gallery.Share/App.xaml.cs

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+using System;
+using Xamarin.Forms;
+using Xamarin.Forms.Xaml;
+using Gallery.Services;
+using Gallery.Views;
+
+namespace Gallery
+{
+    public partial class App : Application
+    {
+
+        public App()
+        {
+            InitializeComponent();
+
+            DependencyService.Register<MockDataStore>();
+            MainPage = new AppShell();
+        }
+
+        protected override void OnStart()
+        {
+        }
+
+        protected override void OnSleep()
+        {
+        }
+
+        protected override void OnResume()
+        {
+        }
+    }
+}

Gallery.Share/AppShell.xaml

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+<?xml version="1.0" encoding="UTF-8"?>
+<Shell xmlns="http://xamarin.com/schemas/2014/forms" 
+       xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
+       xmlns:local="clr-namespace:Gallery.Views"
+       Title="Gallery"
+       x:Class="Gallery.AppShell">
+
+    <!--
+        The overall app visual hierarchy is defined here, along with navigation.
+    
+        https://docs.microsoft.com/xamarin/xamarin-forms/app-fundamentals/shell/
+    -->
+
+    <Shell.Resources>
+        <ResourceDictionary>
+            <Style x:Key="BaseStyle" TargetType="Element">
+                <Setter Property="Shell.BackgroundColor" Value="{StaticResource Primary}" />
+                <Setter Property="Shell.ForegroundColor" Value="White" />
+                <Setter Property="Shell.TitleColor" Value="White" />
+                <Setter Property="Shell.DisabledColor" Value="#B4FFFFFF" />
+                <Setter Property="Shell.UnselectedColor" Value="#95FFFFFF" />
+                <Setter Property="Shell.TabBarBackgroundColor" Value="{StaticResource Primary}" />
+                <Setter Property="Shell.TabBarForegroundColor" Value="White"/>
+                <Setter Property="Shell.TabBarUnselectedColor" Value="#95FFFFFF"/>
+                <Setter Property="Shell.TabBarTitleColor" Value="White"/>
+            </Style>
+            <Style TargetType="TabBar" BasedOn="{StaticResource BaseStyle}" />
+            <Style TargetType="FlyoutItem" BasedOn="{StaticResource BaseStyle}" />
+
+            <!--
+            Default Styles for all Flyout Items
+            https://docs.microsoft.com/xamarin/xamarin-forms/app-fundamentals/shell/flyout#flyoutitem-and-menuitem-style-classes
+            -->
+            <Style Class="FlyoutItemLabelStyle" TargetType="Label">
+                <Setter Property="TextColor" Value="White"></Setter>
+            </Style>
+            <Style Class="FlyoutItemLayoutStyle" TargetType="Layout" ApplyToDerivedTypes="True">
+                <Setter Property="VisualStateManager.VisualStateGroups">
+                    <VisualStateGroupList>
+                        <VisualStateGroup x:Name="CommonStates">
+                            <VisualState x:Name="Normal">
+                                <VisualState.Setters>
+                                    <Setter Property="BackgroundColor" Value="{x:OnPlatform UWP=Transparent, iOS=White}" />
+                                    <Setter TargetName="FlyoutItemLabel" Property="Label.TextColor" Value="{StaticResource Primary}" />
+                                </VisualState.Setters>
+                            </VisualState>
+                            <VisualState x:Name="Selected">
+                                <VisualState.Setters>
+                                    <Setter Property="BackgroundColor" Value="{StaticResource Primary}" />
+                                </VisualState.Setters>
+                            </VisualState>
+                        </VisualStateGroup>
+                    </VisualStateGroupList>
+                </Setter>
+            </Style>
+
+            <!--
+            Custom Style you can apply to any Flyout Item
+            -->
+            <Style Class="MenuItemLayoutStyle" TargetType="Layout" ApplyToDerivedTypes="True">
+                <Setter Property="VisualStateManager.VisualStateGroups">
+                    <VisualStateGroupList>
+                        <VisualStateGroup x:Name="CommonStates">
+                            <VisualState x:Name="Normal">
+                                <VisualState.Setters>
+                                    <Setter TargetName="FlyoutItemLabel" Property="Label.TextColor" Value="{StaticResource Primary}" />
+                                </VisualState.Setters>
+                            </VisualState>
+                        </VisualStateGroup>
+                    </VisualStateGroupList>
+                </Setter>
+            </Style>
+        </ResourceDictionary>
+    </Shell.Resources>
+
+    <!-- 
+        When the Flyout is visible this defines the content to display in the flyout.
+        FlyoutDisplayOptions="AsMultipleItems" will create a separate flyout item for each child element    
+        https://docs.microsoft.com/dotnet/api/xamarin.forms.shellgroupitem.flyoutdisplayoptions?view=xamarin-forms
+    -->
+    <FlyoutItem Title="About" Icon="icon_about.png">
+        <ShellContent Route="AboutPage" ContentTemplate="{DataTemplate local:AboutPage}" />
+    </FlyoutItem>
+    <FlyoutItem Title="Browse" Icon="icon_feed.png">
+        <ShellContent Route="ItemsPage" ContentTemplate="{DataTemplate local:ItemsPage}" />
+    </FlyoutItem>
+
+    <!-- When the Flyout is visible this will be a menu item you can tie a click behavior to  -->
+    <MenuItem Text="Logout" StyleClass="MenuItemLayoutStyle" Clicked="OnMenuItemClicked">
+    </MenuItem>
+
+    <!--
+        TabBar lets you define content that won't show up in a flyout menu. When this content is active
+        the flyout menu won't be available. This is useful for creating areas of the application where 
+        you don't want users to be able to navigate away from. If you would like to navigate to this 
+        content you can do so by calling 
+        await Shell.Current.GoToAsync("//LoginPage");
+    -->
+    <TabBar>
+        <ShellContent Route="LoginPage" ContentTemplate="{DataTemplate local:LoginPage}" />
+    </TabBar>
+
+    <!-- Optional Templates 
+    // These may be provided inline as below or as separate classes.
+
+    // This header appears at the top of the Flyout.
+    // https://docs.microsoft.com/xamarin/xamarin-forms/app-fundamentals/shell/flyout#flyout-header
+    <Shell.FlyoutHeaderTemplate>
+        <DataTemplate>
+            <Grid>ContentHere</Grid>
+        </DataTemplate>
+    </Shell.FlyoutHeaderTemplate>
+
+    // ItemTemplate is for ShellItems as displayed in a Flyout
+    // https://docs.microsoft.com/xamarin/xamarin-forms/app-fundamentals/shell/flyout#define-flyoutitem-appearance
+    <Shell.ItemTemplate>
+        <DataTemplate>
+            <ContentView>
+                Bindable Properties: Title, Icon
+            </ContentView>
+        </DataTemplate>
+    </Shell.ItemTemplate>
+
+    // MenuItemTemplate is for MenuItems as displayed in a Flyout
+    // https://docs.microsoft.com/xamarin/xamarin-forms/app-fundamentals/shell/flyout#define-menuitem-appearance
+    <Shell.MenuItemTemplate>
+        <DataTemplate>
+            <ContentView>
+                Bindable Properties: Text, Icon
+            </ContentView>
+        </DataTemplate>
+    </Shell.MenuItemTemplate>
+
+    -->
+
+</Shell>

Gallery.Share/AppShell.xaml.cs

@@ -0,0 +1,23 @@
+using System;
+using System.Collections.Generic;
+using Gallery.ViewModels;
+using Gallery.Views;
+using Xamarin.Forms;
+
+namespace Gallery
+{
+    public partial class AppShell : Xamarin.Forms.Shell
+    {
+        public AppShell()
+        {
+            InitializeComponent();
+            Routing.RegisterRoute(nameof(ItemDetailPage), typeof(ItemDetailPage));
+            Routing.RegisterRoute(nameof(NewItemPage), typeof(NewItemPage));
+        }
+
+        private async void OnMenuItemClicked(object sender, EventArgs e)
+        {
+            await Shell.Current.GoToAsync("//LoginPage");
+        }
+    }
+}

Gallery.Share/Gallery.Share.projitems

@@ -0,0 +1,79 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup>
+    <MSBuildAllProjects>$(MSBuildAllProjects);$(MSBuildThisFileFullPath)</MSBuildAllProjects>
+    <HasSharedItems>true</HasSharedItems>
+    <SharedGUID>{E72B5C40-090B-4A1C-9170-BD33C14A9A91}</SharedGUID>
+  </PropertyGroup>
+  <PropertyGroup Label="Configuration">
+    <Import_RootNamespace>Gallery.Share</Import_RootNamespace>
+  </PropertyGroup>
+  <ItemGroup>
+    <Compile Include="$(MSBuildThisFileDirectory)Models\Item.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)Services\IDataStore.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)Services\MockDataStore.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)ViewModels\AboutViewModel.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)ViewModels\BaseViewModel.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)ViewModels\ItemDetailViewModel.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)ViewModels\ItemsViewModel.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)ViewModels\LoginViewModel.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)ViewModels\NewItemViewModel.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)Views\AboutPage.xaml.cs">
+      <DependentUpon>Views\AboutPage.xaml</DependentUpon>
+    </Compile>
+    <Compile Include="$(MSBuildThisFileDirectory)Views\ItemDetailPage.xaml.cs">
+      <DependentUpon>Views\ItemDetailPage.xaml</DependentUpon>
+    </Compile>
+    <Compile Include="$(MSBuildThisFileDirectory)Views\ItemsPage.xaml.cs">
+      <DependentUpon>Views\ItemsPage.xaml</DependentUpon>
+    </Compile>
+    <Compile Include="$(MSBuildThisFileDirectory)Views\LoginPage.xaml.cs">
+      <DependentUpon>Views\LoginPage.xaml</DependentUpon>
+    </Compile>
+    <Compile Include="$(MSBuildThisFileDirectory)Views\NewItemPage.xaml.cs">
+      <DependentUpon>Views\NewItemPage.xaml</DependentUpon>
+    </Compile>
+    <Compile Include="$(MSBuildThisFileDirectory)App.xaml.cs">
+      <DependentUpon>App.xaml</DependentUpon>
+    </Compile>
+    <Compile Include="$(MSBuildThisFileDirectory)AppShell.xaml.cs">
+      <DependentUpon>AppShell.xaml</DependentUpon>
+    </Compile>
+  </ItemGroup>
+  <ItemGroup>
+    <Folder Include="$(MSBuildThisFileDirectory)Models\" />
+    <Folder Include="$(MSBuildThisFileDirectory)Services\" />
+    <Folder Include="$(MSBuildThisFileDirectory)ViewModels\" />
+    <Folder Include="$(MSBuildThisFileDirectory)Views\" />
+  </ItemGroup>
+  <ItemGroup>
+    <EmbeddedResource Include="$(MSBuildThisFileDirectory)Views\AboutPage.xaml">
+      <SubType>Designer</SubType>
+      <Generator>MSBuild:UpdateDesignTimeXaml</Generator>
+    </EmbeddedResource>
+    <EmbeddedResource Include="$(MSBuildThisFileDirectory)Views\ItemDetailPage.xaml">
+      <SubType>Designer</SubType>
+      <Generator>MSBuild:UpdateDesignTimeXaml</Generator>
+    </EmbeddedResource>
+    <EmbeddedResource Include="$(MSBuildThisFileDirectory)Views\ItemsPage.xaml">
+      <SubType>Designer</SubType>
+      <Generator>MSBuild:UpdateDesignTimeXaml</Generator>
+    </EmbeddedResource>
+    <EmbeddedResource Include="$(MSBuildThisFileDirectory)Views\LoginPage.xaml">
+      <SubType>Designer</SubType>
+      <Generator>MSBuild:UpdateDesignTimeXaml</Generator>
+    </EmbeddedResource>
+    <EmbeddedResource Include="$(MSBuildThisFileDirectory)Views\NewItemPage.xaml">
+      <SubType>Designer</SubType>
+      <Generator>MSBuild:UpdateDesignTimeXaml</Generator>
+    </EmbeddedResource>
+    <EmbeddedResource Include="$(MSBuildThisFileDirectory)App.xaml">
+      <SubType>Designer</SubType>
+      <Generator>MSBuild:UpdateDesignTimeXaml</Generator>
+    </EmbeddedResource>
+    <EmbeddedResource Include="$(MSBuildThisFileDirectory)AppShell.xaml">
+      <SubType>Designer</SubType>
+      <Generator>MSBuild:UpdateDesignTimeXaml</Generator>
+    </EmbeddedResource>
+  </ItemGroup>
+</Project>

Gallery.Share/Gallery.Share.shproj

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup>
+    <ProjectGuid>{E72B5C40-090B-4A1C-9170-BD33C14A9A91}</ProjectGuid>
+  </PropertyGroup>
+  <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
+  <Import Project="$(MSBuildExtensionsPath32)\Microsoft\VisualStudio\v$(VisualStudioVersion)\CodeSharing\Microsoft.CodeSharing.Common.Default.props" />
+  <Import Project="$(MSBuildExtensionsPath32)\Microsoft\VisualStudio\v$(VisualStudioVersion)\CodeSharing\Microsoft.CodeSharing.Common.props" />
+  <Import Project="Gallery.Share.projitems" Label="Shared" />
+  <Import Project="$(MSBuildExtensionsPath32)\Microsoft\VisualStudio\v$(VisualStudioVersion)\CodeSharing\Microsoft.CodeSharing.CSharp.targets" />
+</Project>

Gallery.Share/GettingStarted.txt

@@ -0,0 +1,34 @@
+Welcome to Xamarin.Forms! Here are some tips to get started building your app.
+
+Building Your App UI
+--------------------
+
+XAML Hot Reload quickly applies UI changes as you make them to your running app.
+This is the most productive way to preview and iteratively create your UI.
+
+Try it out:
+
+1. Run the app by clicking the Start Debugging (play) button in the above toolbar. 
+2. Open <MainProject>\Views\AboutPage.xaml.
+   Don't stop the app - keep it running while making changes.
+3. Change something! Hint: change the Accent color on line 14 from "#96d1ff" to "Pink".
+4. Watch the About screen update on the device or emulator, with the logo background now pink.
+
+Keep going and try more changes!
+
+QuickStart Guide
+----------------
+
+Learn more of the fundamentals for building apps with Xamarin here: https://aka.ms/xamarin-quickstart
+
+Your App Shell
+--------------
+
+This template uses Shell, an app container that reduces the complexity of your apps by providing fundamental features including:
+
+- A single place to describe the app's visual hierarchy.
+- Common navigation such as a flyout menu and tabs.
+- A URI-based navigation scheme that permits navigation to any page in the application.
+- An integrated search handler.
+
+Open AppShell.xaml to begin exploring. To learn more about Shell visit: https://docs.microsoft.com/xamarin/xamarin-forms/app-fundamentals/shell/introduction

Gallery.Share/Models/Item.cs

@@ -0,0 +1,11 @@
+using System;
+
+namespace Gallery.Models
+{
+    public class Item
+    {
+        public string Id { get; set; }
+        public string Text { get; set; }
+        public string Description { get; set; }
+    }
+}

Gallery.Share/Services/IDataStore.cs

@@ -0,0 +1,15 @@
+using System;
+using System.Collections.Generic;
+using System.Threading.Tasks;
+
+namespace Gallery.Services
+{
+    public interface IDataStore<T>
+    {
+        Task<bool> AddItemAsync(T item);
+        Task<bool> UpdateItemAsync(T item);
+        Task<bool> DeleteItemAsync(string id);
+        Task<T> GetItemAsync(string id);
+        Task<IEnumerable<T>> GetItemsAsync(bool forceRefresh = false);
+    }
+}

Gallery.Share/Services/MockDataStore.cs

@@ -0,0 +1,60 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+using Gallery.Models;
+
+namespace Gallery.Services
+{
+    public class MockDataStore : IDataStore<Item>
+    {
+        readonly List<Item> items;
+
+        public MockDataStore()
+        {
+            items = new List<Item>()
+            {
+                new Item { Id = Guid.NewGuid().ToString(), Text = "First item", Description="This is an item description." },
+                new Item { Id = Guid.NewGuid().ToString(), Text = "Second item", Description="This is an item description." },
+                new Item { Id = Guid.NewGuid().ToString(), Text = "Third item", Description="This is an item description." },
+                new Item { Id = Guid.NewGuid().ToString(), Text = "Fourth item", Description="This is an item description." },
+                new Item { Id = Guid.NewGuid().ToString(), Text = "Fifth item", Description="This is an item description." },
+                new Item { Id = Guid.NewGuid().ToString(), Text = "Sixth item", Description="This is an item description." }
+            };
+        }
+
+        public async Task<bool> AddItemAsync(Item item)
+        {
+            items.Add(item);
+
+            return await Task.FromResult(true);
+        }
+
+        public async Task<bool> UpdateItemAsync(Item item)
+        {
+            var oldItem = items.Where((Item arg) => arg.Id == item.Id).FirstOrDefault();
+            items.Remove(oldItem);
+            items.Add(item);
+
+            return await Task.FromResult(true);
+        }
+
+        public async Task<bool> DeleteItemAsync(string id)
+        {
+            var oldItem = items.Where((Item arg) => arg.Id == id).FirstOrDefault();
+            items.Remove(oldItem);
+
+            return await Task.FromResult(true);
+        }
+
+        public async Task<Item> GetItemAsync(string id)
+        {
+            return await Task.FromResult(items.FirstOrDefault(s => s.Id == id));
+        }
+
+        public async Task<IEnumerable<Item>> GetItemsAsync(bool forceRefresh = false)
+        {
+            return await Task.FromResult(items);
+        }
+    }
+}

Gallery.Share/ViewModels/AboutViewModel.cs

@@ -0,0 +1,18 @@
+using System;
+using System.Windows.Input;
+using Xamarin.Essentials;
+using Xamarin.Forms;
+
+namespace Gallery.ViewModels
+{
+    public class AboutViewModel : BaseViewModel
+    {
+        public AboutViewModel()
+        {
+            Title = "About";
+            OpenWebCommand = new Command(async () => await Browser.OpenAsync("https://aka.ms/xamarin-quickstart"));
+        }
+
+        public ICommand OpenWebCommand { get; }
+    }
+}

Gallery.Share/ViewModels/BaseViewModel.cs

@@ -0,0 +1,56 @@
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Runtime.CompilerServices;
+
+using Xamarin.Forms;
+
+using Gallery.Models;
+using Gallery.Services;
+
+namespace Gallery.ViewModels
+{
+    public class BaseViewModel : INotifyPropertyChanged
+    {
+        public IDataStore<Item> DataStore => DependencyService.Get<IDataStore<Item>>();
+
+        bool isBusy = false;
+        public bool IsBusy
+        {
+            get { return isBusy; }
+            set { SetProperty(ref isBusy, value); }
+        }
+
+        string title = string.Empty;
+        public string Title
+        {
+            get { return title; }
+            set { SetProperty(ref title, value); }
+        }
+
+        protected bool SetProperty<T>(ref T backingStore, T value,
+            [CallerMemberName] string propertyName = "",
+            Action onChanged = null)
+        {
+            if (EqualityComparer<T>.Default.Equals(backingStore, value))
+                return false;
+
+            backingStore = value;
+            onChanged?.Invoke();
+            OnPropertyChanged(propertyName);
+            return true;
+        }
+
+        #region INotifyPropertyChanged
+        public event PropertyChangedEventHandler PropertyChanged;
+        protected void OnPropertyChanged([CallerMemberName] string propertyName = "")
+        {
+            var changed = PropertyChanged;
+            if (changed == null)
+                return;
+
+            changed.Invoke(this, new PropertyChangedEventArgs(propertyName));
+        }
+        #endregion
+    }
+}

Gallery.Share/ViewModels/ItemDetailViewModel.cs

@@ -0,0 +1,57 @@
+using System;
+using System.Diagnostics;
+using System.Threading.Tasks;
+using Gallery.Models;
+using Xamarin.Forms;
+
+namespace Gallery.ViewModels
+{
+    [QueryProperty(nameof(ItemId), nameof(ItemId))]
+    public class ItemDetailViewModel : BaseViewModel
+    {
+        private string itemId;
+        private string text;
+        private string description;
+        public string Id { get; set; }
+
+        public string Text
+        {
+            get => text;
+            set => SetProperty(ref text, value);
+        }
+
+        public string Description
+        {
+            get => description;
+            set => SetProperty(ref description, value);
+        }
+
+        public string ItemId
+        {
+            get
+            {
+                return itemId;
+            }
+            set
+            {
+                itemId = value;
+                LoadItemId(value);
+            }
+        }
+
+        public async void LoadItemId(string itemId)
+        {
+            try
+            {
+                var item = await DataStore.GetItemAsync(itemId);
+                Id = item.Id;
+                Text = item.Text;
+                Description = item.Description;
+            }
+            catch (Exception)
+            {
+                Debug.WriteLine("Failed to Load Item");
+            }
+        }
+    }
+}

Gallery.Share/ViewModels/ItemsViewModel.cs

@@ -0,0 +1,86 @@
+using System;
+using System.Collections.ObjectModel;
+using System.Diagnostics;
+using System.Threading.Tasks;
+
+using Xamarin.Forms;
+
+using Gallery.Models;
+using Gallery.Views;
+
+namespace Gallery.ViewModels
+{
+    public class ItemsViewModel : BaseViewModel
+    {
+        private Item _selectedItem;
+
+        public ObservableCollection<Item> Items { get; }
+        public Command LoadItemsCommand { get; }
+        public Command AddItemCommand { get; }
+        public Command<Item> ItemTapped { get; }
+
+        public ItemsViewModel()
+        {
+            Title = "Browse";
+            Items = new ObservableCollection<Item>();
+            LoadItemsCommand = new Command(async () => await ExecuteLoadItemsCommand());
+
+            ItemTapped = new Command<Item>(OnItemSelected);
+
+            AddItemCommand = new Command(OnAddItem);
+        }
+
+        async Task ExecuteLoadItemsCommand()
+        {
+            IsBusy = true;
+
+            try
+            {
+                Items.Clear();
+                var items = await DataStore.GetItemsAsync(true);
+                foreach (var item in items)
+                {
+                    Items.Add(item);
+                }
+            }
+            catch (Exception ex)
+            {
+                Debug.WriteLine(ex);
+            }
+            finally
+            {
+                IsBusy = false;
+            }
+        }
+
+        public void OnAppearing()
+        {
+            IsBusy = true;
+            SelectedItem = null;
+        }
+
+        public Item SelectedItem
+        {
+            get => _selectedItem;
+            set
+            {
+                SetProperty(ref _selectedItem, value);
+                OnItemSelected(value);
+            }
+        }
+
+        private async void OnAddItem(object obj)
+        {
+            await Shell.Current.GoToAsync(nameof(NewItemPage));
+        }
+
+        async void OnItemSelected(Item item)
+        {
+            if (item == null)
+                return;
+
+            // This will push the ItemDetailPage onto the navigation stack
+            await Shell.Current.GoToAsync($"{nameof(ItemDetailPage)}?{nameof(ItemDetailViewModel.ItemId)}={item.Id}");
+        }
+    }
+}

Gallery.Share/ViewModels/LoginViewModel.cs

@@ -0,0 +1,24 @@
+using Gallery.Views;
+using System;
+using System.Collections.Generic;
+using System.Text;
+using Xamarin.Forms;
+
+namespace Gallery.ViewModels
+{
+    public class LoginViewModel : BaseViewModel
+    {
+        public Command LoginCommand { get; }
+
+        public LoginViewModel()
+        {
+            LoginCommand = new Command(OnLoginClicked);
+        }
+
+        private async void OnLoginClicked(object obj)
+        {
+            // Prefixing with `//` switches to a different navigation stack instead of pushing to the active one
+            await Shell.Current.GoToAsync($"//{nameof(AboutPage)}");
+        }
+    }
+}

Gallery.Share/ViewModels/NewItemViewModel.cs

@@ -0,0 +1,65 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+using System.Windows.Input;
+using Gallery.Models;
+using Xamarin.Forms;
+
+namespace Gallery.ViewModels
+{
+    public class NewItemViewModel : BaseViewModel
+    {
+        private string text;
+        private string description;
+
+        public NewItemViewModel()
+        {
+            SaveCommand = new Command(OnSave, ValidateSave);
+            CancelCommand = new Command(OnCancel);
+            this.PropertyChanged +=
+                (_, __) => SaveCommand.ChangeCanExecute();
+        }
+
+        private bool ValidateSave()
+        {
+            return !String.IsNullOrWhiteSpace(text)
+                && !String.IsNullOrWhiteSpace(description);
+        }
+
+        public string Text
+        {
+            get => text;
+            set => SetProperty(ref text, value);
+        }
+
+        public string Description
+        {
+            get => description;
+            set => SetProperty(ref description, value);
+        }
+
+        public Command SaveCommand { get; }
+        public Command CancelCommand { get; }
+
+        private async void OnCancel()
+        {
+            // This will pop the current page off the navigation stack
+            await Shell.Current.GoToAsync("..");
+        }
+
+        private async void OnSave()
+        {
+            Item newItem = new Item()
+            {
+                Id = Guid.NewGuid().ToString(),
+                Text = Text,
+                Description = Description
+            };
+
+            await DataStore.AddItemAsync(newItem);
+
+            // This will pop the current page off the navigation stack
+            await Shell.Current.GoToAsync("..");
+        }
+    }
+}

Gallery.Share/Views/AboutPage.xaml

@@ -0,0 +1,52 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
+             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
+             x:Class="Gallery.Views.AboutPage"
+             xmlns:vm="clr-namespace:Gallery.ViewModels"
+             Title="{Binding Title}">
+    
+    <ContentPage.BindingContext>
+        <vm:AboutViewModel />
+    </ContentPage.BindingContext>
+    
+    <ContentPage.Resources>
+        <ResourceDictionary>
+            <Color x:Key="Accent">#96d1ff</Color>
+        </ResourceDictionary>
+    </ContentPage.Resources>
+
+    <Grid>
+        <Grid.RowDefinitions>
+            <RowDefinition Height="Auto" />
+            <RowDefinition Height="*" />
+        </Grid.RowDefinitions>
+        <StackLayout BackgroundColor="{StaticResource Accent}" VerticalOptions="FillAndExpand" HorizontalOptions="Fill">
+            <StackLayout Orientation="Horizontal" HorizontalOptions="Center" VerticalOptions="Center">
+                <ContentView Padding="0,40,0,40" VerticalOptions="FillAndExpand">
+                    <Image Source="xamarin_logo.png" VerticalOptions="Center" HeightRequest="64" />
+                </ContentView>
+            </StackLayout>
+        </StackLayout>
+        <ScrollView Grid.Row="1">
+            <StackLayout Orientation="Vertical" Padding="30,24,30,24" Spacing="10">
+                <Label Text="Start developing now" FontSize="Title"/>
+                <Label Text="Make changes to your XAML file and save to see your UI update in the running app with XAML Hot Reload. Give it a try!" FontSize="16" Padding="0,0,0,0"/>
+                <Label FontSize="16" Padding="0,24,0,0">
+                    <Label.FormattedText>
+                        <FormattedString>
+                            <FormattedString.Spans>
+                                <Span Text="Learn more at "/>
+                                <Span Text="https://aka.ms/xamarin-quickstart" FontAttributes="Bold"/>
+                            </FormattedString.Spans>
+                        </FormattedString>
+                    </Label.FormattedText>
+                </Label>
+                <Button Margin="0,10,0,0" Text="Learn more"
+                        Command="{Binding OpenWebCommand}"
+                        BackgroundColor="{StaticResource Primary}"
+                        TextColor="White" />
+            </StackLayout>
+        </ScrollView>
+    </Grid>
+
+</ContentPage>

Gallery.Share/Views/AboutPage.xaml.cs

@@ -0,0 +1,15 @@
+using System;
+using System.ComponentModel;
+using Xamarin.Forms;
+using Xamarin.Forms.Xaml;
+
+namespace Gallery.Views
+{
+    public partial class AboutPage : ContentPage
+    {
+        public AboutPage()
+        {
+            InitializeComponent();
+        }
+    }
+}

Gallery.Share/Views/ItemDetailPage.xaml

@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
+             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
+             x:Class="Gallery.Views.ItemDetailPage"
+             Title="{Binding Title}">
+
+    <StackLayout Spacing="20" Padding="15">
+        <Label Text="Text:" FontSize="Medium" />
+        <Label Text="{Binding Text}" FontSize="Small"/>
+        <Label Text="Description:" FontSize="Medium" />
+        <Label Text="{Binding Description}" FontSize="Small"/>
+    </StackLayout>
+    
+</ContentPage>

Gallery.Share/Views/ItemDetailPage.xaml.cs

@@ -0,0 +1,15 @@
+using System.ComponentModel;
+using Xamarin.Forms;
+using Gallery.ViewModels;
+
+namespace Gallery.Views
+{
+    public partial class ItemDetailPage : ContentPage
+    {
+        public ItemDetailPage()
+        {
+            InitializeComponent();
+            BindingContext = new ItemDetailViewModel();
+        }
+    }
+}

Gallery.Share/Views/ItemsPage.xaml

@@ -0,0 +1,44 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
+             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
+             x:Class="Gallery.Views.ItemsPage"
+             Title="{Binding Title}"
+             xmlns:local="clr-namespace:Gallery.ViewModels"  
+             xmlns:model="clr-namespace:Gallery.Models"  
+             x:Name="BrowseItemsPage">
+
+    <ContentPage.ToolbarItems>
+        <ToolbarItem Text="Add" Command="{Binding AddItemCommand}" />
+    </ContentPage.ToolbarItems>
+    <!--
+      x:DataType enables compiled bindings for better performance and compile time validation of binding expressions.
+      https://docs.microsoft.com/xamarin/xamarin-forms/app-fundamentals/data-binding/compiled-bindings
+    -->
+    <RefreshView x:DataType="local:ItemsViewModel" Command="{Binding LoadItemsCommand}" IsRefreshing="{Binding IsBusy, Mode=TwoWay}">
+        <CollectionView x:Name="ItemsListView"
+                ItemsSource="{Binding Items}"
+                SelectionMode="None">
+            <CollectionView.ItemTemplate>
+                <DataTemplate>
+                    <StackLayout Padding="10" x:DataType="model:Item">
+                        <Label Text="{Binding Text}" 
+                            LineBreakMode="NoWrap" 
+                            Style="{DynamicResource ListItemTextStyle}" 
+                            FontSize="16" />
+                        <Label Text="{Binding Description}" 
+                            LineBreakMode="NoWrap"
+                            Style="{DynamicResource ListItemDetailTextStyle}"
+                            FontSize="13" />
+                        <StackLayout.GestureRecognizers>
+                            <TapGestureRecognizer 
+                                NumberOfTapsRequired="1"
+                                Command="{Binding Source={RelativeSource AncestorType={x:Type local:ItemsViewModel}}, Path=ItemTapped}"		
+                                CommandParameter="{Binding .}">
+                            </TapGestureRecognizer>
+                        </StackLayout.GestureRecognizers>
+                    </StackLayout>
+                </DataTemplate>
+            </CollectionView.ItemTemplate>
+        </CollectionView>
+    </RefreshView>
+</ContentPage>

Gallery.Share/Views/ItemsPage.xaml.cs

@@ -0,0 +1,33 @@
+using System;
+using System.ComponentModel;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using Xamarin.Forms;
+using Xamarin.Forms.Xaml;
+
+using Gallery.Models;
+using Gallery.Views;
+using Gallery.ViewModels;
+
+namespace Gallery.Views
+{
+    public partial class ItemsPage : ContentPage
+    {
+        ItemsViewModel _viewModel;
+
+        public ItemsPage()
+        {
+            InitializeComponent();
+
+            BindingContext = _viewModel = new ItemsViewModel();
+        }
+
+        protected override void OnAppearing()
+        {
+            base.OnAppearing();
+            _viewModel.OnAppearing();
+        }
+    }
+}

Gallery.Share/Views/LoginPage.xaml

@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
+             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
+             xmlns:d="http://xamarin.com/schemas/2014/forms/design"
+             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+             mc:Ignorable="d"
+             x:Class="Gallery.Views.LoginPage"
+             Shell.NavBarIsVisible="False">
+    <ContentPage.Content>
+        <StackLayout Padding="10,0,10,0" VerticalOptions="Center">
+            <Button VerticalOptions="Center" Text="Login" Command="{Binding LoginCommand}"/>
+        </StackLayout>
+    </ContentPage.Content>
+</ContentPage>

Gallery.Share/Views/LoginPage.xaml.cs

@@ -0,0 +1,21 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using Gallery.ViewModels;
+using Xamarin.Forms;
+using Xamarin.Forms.Xaml;
+
+namespace Gallery.Views
+{
+    [XamlCompilation(XamlCompilationOptions.Compile)]
+    public partial class LoginPage : ContentPage
+    {
+        public LoginPage()
+        {
+            InitializeComponent();
+            this.BindingContext = new LoginViewModel();
+        }
+    }
+}

Gallery.Share/Views/NewItemPage.xaml

@@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
+             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
+             x:Class="Gallery.Views.NewItemPage"
+             Shell.PresentationMode="ModalAnimated"
+             Title="New Item"
+             xmlns:ios="clr-namespace:Xamarin.Forms.PlatformConfiguration.iOSSpecific;assembly=Xamarin.Forms.Core"
+             ios:Page.UseSafeArea="true">
+    <ContentPage.Content>
+        <StackLayout Spacing="3" Padding="15">
+            <Label Text="Text" FontSize="Medium" />
+            <Entry Text="{Binding Text, Mode=TwoWay}" FontSize="Medium" />
+            <Label Text="Description" FontSize="Medium" />
+            <Editor Text="{Binding Description, Mode=TwoWay}" AutoSize="TextChanges" FontSize="Medium" Margin="0" />
+            <StackLayout Orientation="Horizontal">
+                <Button Text="Cancel" Command="{Binding CancelCommand}" HorizontalOptions="FillAndExpand"></Button>
+                <Button Text="Save" Command="{Binding SaveCommand}" HorizontalOptions="FillAndExpand"></Button>
+            </StackLayout>
+        </StackLayout>
+    </ContentPage.Content>
+    
+</ContentPage>

Gallery.Share/Views/NewItemPage.xaml.cs

@@ -0,0 +1,22 @@
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using Xamarin.Forms;
+using Xamarin.Forms.Xaml;
+
+using Gallery.Models;
+using Gallery.ViewModels;
+
+namespace Gallery.Views
+{
+    public partial class NewItemPage : ContentPage
+    {
+        public Item Item { get; set; }
+
+        public NewItemPage()
+        {
+            InitializeComponent();
+            BindingContext = new NewItemViewModel();
+        }
+    }
+}

Gallery.Util/Converter.cs

@@ -0,0 +1,95 @@
+using System;
+using System.Collections.Generic;
+using System.Text.Json;
+using System.Text.Json.Serialization;
+using Gallery.Util.Model;
+
+namespace Gallery.Util
+{
+    public class GalleryItemConverter : JsonConverter<GalleryItem>
+    {
+        public override GalleryItem Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
+        {
+            reader.Read();
+            if (reader.TokenType != JsonTokenType.StartObject)
+            {
+                return null;
+            }
+            var item = new GalleryItem();
+            while (reader.Read())
+            {
+                if (reader.TokenType == JsonTokenType.PropertyName)
+                {
+                    var name = reader.GetString();
+                    reader.Read();
+                    switch (name)
+                    {
+                        case nameof(GalleryItem.Id): item.Id = reader.GetInt64(); break;
+                        case nameof(GalleryItem.Tags):
+                            if (reader.TokenType == JsonTokenType.StartArray)
+                            {
+                                var tags = new List<string>();
+                                while (reader.Read())
+                                {
+                                    if (reader.TokenType == JsonTokenType.EndArray)
+                                    {
+                                        break;
+                                    }
+                                    if (reader.TokenType == JsonTokenType.String)
+                                    {
+                                        tags.Add(reader.GetString());
+                                    }
+                                }
+                                item.Tags = tags.ToArray();
+                            }
+                            break;
+                        case nameof(GalleryItem.CreatedTime): item.CreatedTime = reader.GetDateTime(); break;
+                        case nameof(GalleryItem.UpdatedTime): item.UpdatedTime = reader.GetDateTime(); break;
+                        case nameof(GalleryItem.UserId): item.UserId = reader.GetString(); break;
+                        case nameof(GalleryItem.UserName): item.UserName = reader.GetString(); break;
+                        case nameof(GalleryItem.Source): item.Source = reader.GetString(); break;
+                        case nameof(GalleryItem.PreviewUrl): item.PreviewUrl = reader.GetString(); break;
+                        case nameof(GalleryItem.RawUrl): item.RawUrl = reader.GetString(); break;
+                        case nameof(GalleryItem.Width): item.Width = reader.GetInt32(); break;
+                        case nameof(GalleryItem.Height): item.Height = reader.GetInt32(); break;
+                    }
+                }
+            }
+            return item;
+        }
+
+        public override void Write(Utf8JsonWriter writer, GalleryItem value, JsonSerializerOptions options)
+        {
+            if (value == null)
+            {
+                writer.WriteNullValue();
+                return;
+            }
+
+            writer.WriteStartObject();
+
+            writer.WriteNumber(nameof(GalleryItem.Id), value.Id);
+            if (value.Tags != null)
+            {
+                writer.WritePropertyName(nameof(GalleryItem.Tags));
+                writer.WriteStartArray();
+                for (var i = 0; i < value.Tags.Length; i++)
+                {
+                    writer.WriteStringValue(value.Tags[i]);
+                }
+                writer.WriteEndArray();
+            }
+            writer.WriteString(nameof(GalleryItem.CreatedTime), value.CreatedTime);
+            writer.WriteString(nameof(GalleryItem.UpdatedTime), value.UpdatedTime);
+            writer.WriteString(nameof(GalleryItem.UserId), value.UserId);
+            writer.WriteString(nameof(GalleryItem.UserName), value.UserName);
+            writer.WriteString(nameof(GalleryItem.Source), value.Source);
+            writer.WriteString(nameof(GalleryItem.PreviewUrl), value.PreviewUrl);
+            writer.WriteString(nameof(GalleryItem.RawUrl), value.RawUrl);
+            writer.WriteNumber(nameof(GalleryItem.Width), value.Width);
+            writer.WriteNumber(nameof(GalleryItem.Height), value.Height);
+
+            writer.WriteEndObject();
+        }
+    }
+}

Gallery.Util/Gallery.Util.csproj

@@ -0,0 +1,23 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>netstandard2.1</TargetFramework>
+    <SignAssembly>true</SignAssembly>
+    <AssemblyOriginatorKeyFile>..\Ref\Tsanie.snk</AssemblyOriginatorKeyFile>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <None Remove="System.Text.Json" />
+    <None Remove="Xamarin.Forms" />
+    <None Remove="Interface\" />
+    <None Remove="Model\" />
+  </ItemGroup>
+  <ItemGroup>
+    <PackageReference Include="System.Text.Json" Version="5.0.2" />
+    <PackageReference Include="Xamarin.Forms" Version="5.0.0.2083" />
+  </ItemGroup>
+  <ItemGroup>
+    <Folder Include="Interface\" />
+    <Folder Include="Model\" />
+  </ItemGroup>
+</Project>

Gallery.Util/Interface/IGallerySource.cs

@@ -0,0 +1,11 @@
+using Gallery.Util.Model;
+
+namespace Gallery.Util.Interface
+{
+    public interface IGallerySource
+    {
+        string GetCookie();
+
+        GalleryItem[] GetRecentItems(int page);
+    }
+}

Gallery.Util/Model/GalleryItem.cs

@@ -0,0 +1,79 @@
+using System;
+using System.Text.Json.Serialization;
+using Xamarin.Forms;
+
+namespace Gallery.Util.Model
+{
+    [JsonConverter(typeof(GalleryItemConverter))]
+    public class GalleryItem : BindableObject
+    {
+        const double PREVIEW_WIDTH = 200.0;
+
+        public static readonly BindableProperty TagDescriptionProperty = BindableProperty.Create(nameof(TagDescription), typeof(string), typeof(GalleryItem));
+        public static readonly BindableProperty PreviewImageProperty = BindableProperty.Create(nameof(PreviewImage), typeof(ImageSource), typeof(GalleryItem));
+        public static readonly BindableProperty UserNameProperty = BindableProperty.Create(nameof(UserName), typeof(string), typeof(GalleryItem));
+        public static readonly BindableProperty CreatedTimeProperty = BindableProperty.Create(nameof(CreatedTime), typeof(DateTime), typeof(GalleryItem));
+        public static readonly BindableProperty UpdatedTimeProperty = BindableProperty.Create(nameof(UpdatedTime), typeof(DateTime), typeof(GalleryItem));
+        public static readonly BindableProperty ImageHeightProperty = BindableProperty.Create(nameof(ImageHeight), typeof(GridLength), typeof(GalleryItem), GridLength.Auto);
+
+        [JsonIgnore]
+        public string TagDescription { get; set; }
+        [JsonIgnore]
+        public ImageSource PreviewImage { get; set; }
+        [JsonIgnore]
+        public GridLength ImageHeight { get; set; }
+
+        public long Id { get; internal set; }
+        private string[] tags;
+        public string[] Tags
+        {
+            get => tags;
+            set
+            {
+                tags = value;
+                if (value != null)
+                {
+                    TagDescription = string.Join(' ', tags);
+                }
+                else
+                {
+                    TagDescription = null;
+                }
+            }
+        }
+        public DateTime CreatedTime { get; set; }
+        public DateTime UpdatedTime { get; set; }
+        public string UserId { get; set; }
+        public string UserName { get; set; }
+        public string Source { get; set; }
+        public string PreviewUrl { get; set; }
+        public string RawUrl { get; set; }
+
+        private int width;
+        private int height;
+        public int Width
+        {
+            get => width;
+            set
+            {
+                width = value;
+                if (width > 0 && height > 0)
+                {
+                    ImageHeight = new GridLength(PREVIEW_WIDTH * height / width);
+                }
+            }
+        }
+        public int Height
+        {
+            get => height;
+            set
+            {
+                height = value;
+                if (width > 0 && height > 0)
+                {
+                    ImageHeight = new GridLength(PREVIEW_WIDTH * height / width);
+                }
+            }
+        }
+    }
+}

Gallery.iOS/AppDelegate.cs

@@ -0,0 +1,27 @@
+using Foundation;
+using UIKit;
+
+namespace Gallery.iOS
+{
+    // The UIApplicationDelegate for the application. This class is responsible for launching the 
+    // User Interface of the application, as well as listening (and optionally responding) to 
+    // application events from iOS.
+    [Register("AppDelegate")]
+    public partial class AppDelegate : Xamarin.Forms.Platform.iOS.FormsApplicationDelegate
+    {
+        //
+        // This method is invoked when the application has loaded and is ready to run. In this 
+        // method you should instantiate the window, load the UI into it and then make the window
+        // visible.
+        //
+        // You have 17 seconds to return from this method, or iOS will terminate your application.
+        //
+        public override bool FinishedLaunching(UIApplication app, NSDictionary options)
+        {
+            Xamarin.Forms.Forms.Init();
+            LoadApplication(new App());
+
+            return base.FinishedLaunching(app, options);
+        }
+    }
+}

Gallery.iOS/Assets.xcassets/AppIcon.appiconset/Contents.json

@@ -0,0 +1,117 @@
+{
+  "images": [
+    {
+      "scale": "2x",
+      "size": "20x20",
+      "idiom": "iphone",
+      "filename": "Icon40.png"
+    },
+    {
+      "scale": "3x",
+      "size": "20x20",
+      "idiom": "iphone",
+      "filename": "Icon60.png"
+    },
+    {
+      "scale": "2x",
+      "size": "29x29",
+      "idiom": "iphone",
+      "filename": "Icon58.png"
+    },
+    {
+      "scale": "3x",
+      "size": "29x29",
+      "idiom": "iphone",
+      "filename": "Icon87.png"
+    },
+    {
+      "scale": "2x",
+      "size": "40x40",
+      "idiom": "iphone",
+      "filename": "Icon80.png"
+    },
+    {
+      "scale": "3x",
+      "size": "40x40",
+      "idiom": "iphone",
+      "filename": "Icon120.png"
+    },
+    {
+      "scale": "2x",
+      "size": "60x60",
+      "idiom": "iphone",
+      "filename": "Icon120.png"
+    },
+    {
+      "scale": "3x",
+      "size": "60x60",
+      "idiom": "iphone",
+      "filename": "Icon180.png"
+    },
+    {
+      "scale": "1x",
+      "size": "20x20",
+      "idiom": "ipad",
+      "filename": "Icon20.png"
+    },
+    {
+      "scale": "2x",
+      "size": "20x20",
+      "idiom": "ipad",
+      "filename": "Icon40.png"
+    },
+    {
+      "scale": "1x",
+      "size": "29x29",
+      "idiom": "ipad",
+      "filename": "Icon29.png"
+    },
+    {
+      "scale": "2x",
+      "size": "29x29",
+      "idiom": "ipad",
+      "filename": "Icon58.png"
+    },
+    {
+      "scale": "1x",
+      "size": "40x40",
+      "idiom": "ipad",
+      "filename": "Icon40.png"
+    },
+    {
+      "scale": "2x",
+      "size": "40x40",
+      "idiom": "ipad",
+      "filename": "Icon80.png"
+    },
+    {
+      "scale": "1x",
+      "size": "76x76",
+      "idiom": "ipad",
+      "filename": "Icon76.png"
+    },
+    {
+      "scale": "2x",
+      "size": "76x76",
+      "idiom": "ipad",
+      "filename": "Icon152.png"
+    },
+    {
+      "scale": "2x",
+      "size": "83.5x83.5",
+      "idiom": "ipad",
+      "filename": "Icon167.png"
+    },
+    {
+      "scale": "1x",
+      "size": "1024x1024",
+      "idiom": "ios-marketing",
+      "filename": "Icon1024.png"
+    }
+  ],
+  "properties": {},
+  "info": {
+    "version": 1,
+    "author": "xcode"
+  }
+}

Gallery.iOS/Entitlements.plist

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8" ?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+</dict>
+</plist>
+

Gallery.iOS/Gallery.iOS.csproj

@@ -0,0 +1,157 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="4.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup>
+    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
+    <Platform Condition=" '$(Platform)' == '' ">iPhoneSimulator</Platform>
+    <ProductVersion>8.0.30703</ProductVersion>
+    <SchemaVersion>2.0</SchemaVersion>
+    <ProjectGuid>{94E59D2C-9083-4BAB-9567-A0B0C4B4266D}</ProjectGuid>
+    <ProjectTypeGuids>{FEACFBD2-3405-455C-9665-78FE426C6842};{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}</ProjectTypeGuids>
+    <TemplateGuid>{89a4fe7c-635d-49c9-8d8c-5cd363c0d68d}</TemplateGuid>
+    <OutputType>Exe</OutputType>
+    <RootNamespace>Gallery.iOS</RootNamespace>
+    <IPhoneResourcePrefix>Resources</IPhoneResourcePrefix>
+    <AssemblyName>Gallery.iOS</AssemblyName>
+    <MtouchEnableSGenConc>true</MtouchEnableSGenConc>
+    <MtouchHttpClientHandler>NSUrlSessionHandler</MtouchHttpClientHandler>
+    <ProvisioningType>automatic</ProvisioningType>
+    <AutoGenerateBindingRedirects>true</AutoGenerateBindingRedirects>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|iPhoneSimulator' ">
+    <DebugSymbols>true</DebugSymbols>
+    <DebugType>portable</DebugType>
+    <Optimize>false</Optimize>
+    <OutputPath>bin\iPhoneSimulator\Debug</OutputPath>
+    <DefineConstants>DEBUG</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+    <MtouchArch>x86_64</MtouchArch>
+    <MtouchLink>None</MtouchLink>
+    <MtouchDebug>true</MtouchDebug>
+    <CodesignProvision>Gallery.Dev</CodesignProvision>
+    <CodesignKey>Apple Development: Li Chen (5559SN7Z38)</CodesignKey>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|iPhoneSimulator' ">
+    <DebugType>none</DebugType>
+    <Optimize>true</Optimize>
+    <OutputPath>bin\iPhoneSimulator\Release</OutputPath>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+    <MtouchLink>None</MtouchLink>
+    <MtouchArch>x86_64</MtouchArch>
+    <CodesignProvision>Gallery.Ad-Hoc</CodesignProvision>
+    <CodesignKey>Apple Distribution: Li Chen (7HSM5CKPJ2)</CodesignKey>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|iPhone' ">
+    <DebugSymbols>true</DebugSymbols>
+    <DebugType>portable</DebugType>
+    <Optimize>false</Optimize>
+    <OutputPath>bin\iPhone\Debug</OutputPath>
+    <DefineConstants>DEBUG</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+    <MtouchArch>ARM64</MtouchArch>
+    <CodesignKey>Apple Development: Li Chen (5559SN7Z38)</CodesignKey>
+    <MtouchDebug>true</MtouchDebug>
+    <CodesignEntitlements>Entitlements.plist</CodesignEntitlements>
+    <MtouchLink>None</MtouchLink>
+    <MtouchInterpreter>-all</MtouchInterpreter>
+    <CodesignProvision>Gallery.Dev</CodesignProvision>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|iPhone' ">
+    <DebugType>none</DebugType>
+    <Optimize>true</Optimize>
+    <OutputPath>bin\iPhone\Release</OutputPath>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+    <MtouchArch>ARM64</MtouchArch>
+    <CodesignKey>Apple Distribution: Li Chen (7HSM5CKPJ2)</CodesignKey>
+    <CodesignEntitlements>Entitlements.plist</CodesignEntitlements>
+    <CodesignProvision>Gallery.Ad-Hoc</CodesignProvision>
+    <MtouchLink>SdkOnly</MtouchLink>
+  </PropertyGroup>
+  <ItemGroup>
+    <Compile Include="Main.cs" />
+    <Compile Include="AppDelegate.cs" />
+    <None Include="Entitlements.plist" />
+    <None Include="Info.plist" />
+    <Compile Include="Properties\AssemblyInfo.cs" />
+  </ItemGroup>
+  <ItemGroup>
+    <ImageAsset Include="Assets.xcassets\AppIcon.appiconset\Contents.json">
+      <Visible>false</Visible>
+    </ImageAsset>
+    <ImageAsset Include="Assets.xcassets\AppIcon.appiconset\Icon1024.png">
+      <Visible>false</Visible>
+    </ImageAsset>
+    <ImageAsset Include="Assets.xcassets\AppIcon.appiconset\Icon180.png">
+      <Visible>false</Visible>
+    </ImageAsset>
+    <ImageAsset Include="Assets.xcassets\AppIcon.appiconset\Icon167.png">
+      <Visible>false</Visible>
+    </ImageAsset>
+    <ImageAsset Include="Assets.xcassets\AppIcon.appiconset\Icon152.png">
+      <Visible>false</Visible>
+    </ImageAsset>
+    <ImageAsset Include="Assets.xcassets\AppIcon.appiconset\Icon120.png">
+      <Visible>false</Visible>
+    </ImageAsset>
+    <ImageAsset Include="Assets.xcassets\AppIcon.appiconset\Icon87.png">
+      <Visible>false</Visible>
+    </ImageAsset>
+    <ImageAsset Include="Assets.xcassets\AppIcon.appiconset\Icon80.png">
+      <Visible>false</Visible>
+    </ImageAsset>
+    <ImageAsset Include="Assets.xcassets\AppIcon.appiconset\Icon76.png">
+      <Visible>false</Visible>
+    </ImageAsset>
+    <ImageAsset Include="Assets.xcassets\AppIcon.appiconset\Icon60.png">
+      <Visible>false</Visible>
+    </ImageAsset>
+    <ImageAsset Include="Assets.xcassets\AppIcon.appiconset\Icon58.png">
+      <Visible>false</Visible>
+    </ImageAsset>
+    <ImageAsset Include="Assets.xcassets\AppIcon.appiconset\Icon40.png">
+      <Visible>false</Visible>
+    </ImageAsset>
+    <ImageAsset Include="Assets.xcassets\AppIcon.appiconset\Icon29.png">
+      <Visible>false</Visible>
+    </ImageAsset>
+    <ImageAsset Include="Assets.xcassets\AppIcon.appiconset\Icon20.png">
+      <Visible>false</Visible>
+    </ImageAsset>
+    <BundleResource Include="Resources\icon_about.png" />
+    <BundleResource Include="Resources\icon_about%402x.png" />
+    <BundleResource Include="Resources\icon_about%403x.png" />
+    <BundleResource Include="Resources\icon_feed.png" />
+    <BundleResource Include="Resources\icon_feed%402x.png" />
+    <BundleResource Include="Resources\icon_feed%403x.png" />
+    <BundleResource Include="Resources\xamarin_logo.png" />
+    <BundleResource Include="Resources\xamarin_logo%402x.png" />
+    <BundleResource Include="Resources\xamarin_logo%403x.png" />
+    <InterfaceDefinition Include="Resources\LaunchScreen.storyboard" />
+    <BundleResource Include="Resources\fa-light-300.ttf" />
+    <BundleResource Include="Resources\fa-regular-400.ttf" />
+    <BundleResource Include="Resources\fa-solid-900.ttf" />
+  </ItemGroup>
+  <ItemGroup>
+    <Reference Include="System" />
+    <Reference Include="System.Xml" />
+    <Reference Include="System.Core" />
+    <Reference Include="Xamarin.iOS" />
+    <Reference Include="System.Numerics" />
+    <Reference Include="System.Numerics.Vectors" />
+  </ItemGroup>
+  <ItemGroup>
+    <PackageReference Include="Xamarin.Forms" Version="5.0.0.2083" />
+    <PackageReference Include="Xamarin.Essentials" Version="1.7.0" />
+  </ItemGroup>
+  <ItemGroup>
+    <ProjectReference Include="..\Gallery.Util\Gallery.Util.csproj">
+      <Project>{222C22EC-3A47-4CF5-B9FB-CA28DE9F4BC8}</Project>
+      <Name>Gallery.Util</Name>
+    </ProjectReference>
+  </ItemGroup>
+  <Import Project="..\Gallery.Share\Gallery.Share.projitems" Label="Shared" Condition="Exists('..\Gallery.Share\Gallery.Share.projitems')" />
+  <Import Project="$(MSBuildExtensionsPath)\Xamarin\iOS\Xamarin.iOS.CSharp.targets" />
+</Project>

Gallery.iOS/Info.plist

@@ -0,0 +1,52 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>UIDeviceFamily</key>
+	<array>
+		<integer>1</integer>
+		<integer>2</integer>
+	</array>
+	<key>UISupportedInterfaceOrientations</key>
+	<array>
+		<string>UIInterfaceOrientationPortrait</string>
+		<string>UIInterfaceOrientationLandscapeLeft</string>
+		<string>UIInterfaceOrientationLandscapeRight</string>
+	</array>
+	<key>UISupportedInterfaceOrientations~ipad</key>
+	<array>
+		<string>UIInterfaceOrientationPortrait</string>
+		<string>UIInterfaceOrientationPortraitUpsideDown</string>
+		<string>UIInterfaceOrientationLandscapeLeft</string>
+		<string>UIInterfaceOrientationLandscapeRight</string>
+	</array>
+	<key>MinimumOSVersion</key>
+	<string>13.0</string>
+	<key>CFBundleDisplayName</key>
+	<string>Gallery</string>
+	<key>CFBundleIdentifier</key>
+	<string>org.tsanie.gallery</string>
+	<key>UILaunchStoryboardName</key>
+	<string>LaunchScreen</string>
+	<key>CFBundleName</key>
+	<string>Gallery</string>
+	<key>XSAppIconAssets</key>
+	<string>Assets.xcassets/AppIcon.appiconset</string>
+	<key>CFBundleShortVersionString</key>
+	<string>1.0.805</string>
+	<key>CFBundleVersion</key>
+	<string>1</string>
+	<key>UIAppFonts</key>
+	<array>
+		<string>fa-light-300.ttf</string>
+		<string>fa-regular-400.ttf</string>
+		<string>fa-solid-900.ttf</string>
+	</array>
+	<key>UIViewControllerBasedStatusBarAppearance</key>
+	<true/>
+	<key>UIStatusBarStyle</key>
+	<string>UIStatusBarStyleDefault</string>
+	<key>CFBundleDevelopmentRegion</key>
+	<string>China</string>
+</dict>
+</plist>

Gallery.iOS/Main.cs

@@ -0,0 +1,15 @@
+using UIKit;
+
+namespace Gallery.iOS
+{
+    public class Application
+    {
+        // This is the main entry point of the application.
+        static void Main(string[] args)
+        {
+            // if you want to use a different Application Delegate class from "AppDelegate"
+            // you can specify it here.
+            UIApplication.Main(args, null, "AppDelegate");
+        }
+    }
+}

Gallery.iOS/Properties/AssemblyInfo.cs

@@ -0,0 +1,38 @@
+using System.Reflection;
+using System.Runtime.InteropServices;
+using Xamarin.Forms.Xaml;
+
+// General Information about an assembly is controlled through the following 
+// set of attributes. Change these attribute values to modify the information
+// associated with an assembly.
+[assembly: AssemblyTitle("Gallery.iOS")]
+[assembly: AssemblyDescription("")]
+[assembly: AssemblyConfiguration("")]
+[assembly: AssemblyCompany("")]
+[assembly: AssemblyProduct("Gallery.iOS")]
+[assembly: AssemblyCopyright("Copyright © Tsanie.Org 2021")]
+[assembly: AssemblyTrademark("")]
+[assembly: AssemblyCulture("")]
+
+// Setting ComVisible to false makes the types in this assembly not visible 
+// to COM components.  If you need to access a type in this assembly from 
+// COM, set the ComVisible attribute to true on that type.
+[assembly: ComVisible(false)]
+
+// The following GUID is for the ID of the typelib if this project is exposed to COM
+[assembly: Guid("72bdc44f-c588-44f3-b6df-9aace7daafdd")]
+
+// Version information for an assembly consists of the following four values:
+//
+//      Major Version
+//      Minor Version 
+//      Build Number
+//      Revision
+//
+// You can specify all the values or you can default the Build and Revision Numbers 
+// by using the '*' as shown below:
+// [assembly: AssemblyVersion("1.0.*")]
+[assembly: AssemblyVersion("1.0.0.0")]
+[assembly: AssemblyFileVersion("1.0.0.0")]
+
+[assembly: XamlCompilation(XamlCompilationOptions.Compile)]

Gallery.iOS/Resources/LaunchScreen.storyboard

@@ -0,0 +1,39 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="6245" systemVersion="13F34" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" initialViewController="X5k-f2-b5h">
+    <dependencies>
+        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="6238"/>
+    </dependencies>
+    <scenes>
+        <!--View Controller-->
+        <scene sceneID="gAE-YM-kbH">
+            <objects>
+                <viewController id="X5k-f2-b5h" sceneMemberID="viewController">
+                    <layoutGuides>
+                        <viewControllerLayoutGuide type="top" id="Y8P-hJ-Z43"/>
+                        <viewControllerLayoutGuide type="bottom" id="9ZL-r4-8FZ"/>
+                    </layoutGuides>
+                    <view key="view" contentMode="scaleToFill" id="yd7-JS-zBw">
+                        <rect key="frame" x="0.0" y="0.0" width="600" height="600"/>
+                        <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
+                        <subviews>
+                            <imageView userInteractionEnabled="NO" contentMode="scaleToFill" misplaced="YES" image="Icon-60.png" translatesAutoresizingMaskIntoConstraints="NO" id="23">
+                                <rect key="frame" x="270" y="270" width="60" height="60"/>
+                                <rect key="contentStretch" x="0.0" y="0.0" width="0.0" height="0.0"/>
+                            </imageView>
+                        </subviews>
+                        <color key="backgroundColor" red="0.20392156862745098" green="0.59607843137254901" blue="0.85882352941176465" alpha="1" colorSpace="calibratedRGB"/>
+                        <constraints>
+                            <constraint firstItem="23" firstAttribute="centerY" secondItem="yd7-JS-zBw" secondAttribute="centerY" priority="1" id="39"/>
+                            <constraint firstItem="23" firstAttribute="centerX" secondItem="yd7-JS-zBw" secondAttribute="centerX" priority="1" id="41"/>
+                        </constraints>
+                    </view>
+                </viewController>
+                <placeholder placeholderIdentifier="IBFirstResponder" id="XAI-xm-WK6" userLabel="First Responder" sceneMemberID="firstResponder"/>
+            </objects>
+            <point key="canvasLocation" x="349" y="339"/>
+        </scene>
+    </scenes>
+    <resources>
+        <image name="Icon-60.png" width="180" height="180"/>
+    </resources>
+</document>

Gallery.sln

@@ -0,0 +1,53 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 16
+VisualStudioVersion = 16.0.810.6
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Gallery.iOS", "Gallery.iOS\Gallery.iOS.csproj", "{94E59D2C-9083-4BAB-9567-A0B0C4B4266D}"
+EndProject
+Project("{D954291E-2A0B-460D-934E-DC6B0785DB48}") = "Gallery.Share", "Gallery.Share\Gallery.Share.shproj", "{E72B5C40-090B-4A1C-9170-BD33C14A9A91}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Gallery.Util", "Gallery.Util\Gallery.Util.csproj", "{222C22EC-3A47-4CF5-B9FB-CA28DE9F4BC8}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|iPhoneSimulator = Debug|iPhoneSimulator
+		Release|iPhoneSimulator = Release|iPhoneSimulator
+		Debug|iPhone = Debug|iPhone
+		Release|iPhone = Release|iPhone
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{94E59D2C-9083-4BAB-9567-A0B0C4B4266D}.Debug|iPhoneSimulator.ActiveCfg = Debug|iPhoneSimulator
+		{94E59D2C-9083-4BAB-9567-A0B0C4B4266D}.Debug|iPhoneSimulator.Build.0 = Debug|iPhoneSimulator
+		{94E59D2C-9083-4BAB-9567-A0B0C4B4266D}.Release|iPhoneSimulator.ActiveCfg = Release|iPhoneSimulator
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