change app directory

FlowerApp/Controls/WaterfallLayout.cs

@@ -0,0 +1,12 @@
+namespace Blahblah.FlowerApp.Controls;
+
+public class WaterfallLayout : View
+{
+    public static readonly BindableProperty ColumnsProperty = BindableProperty.Create(nameof(Columns), typeof(int), typeof(WaterfallLayout), defaultValue: 2);
+
+    public int Columns
+    {
+        get => (int)GetValue(ColumnsProperty);
+        set => SetValue(ColumnsProperty, value);
+    }
+}