Billing/Billing.Shared/SplashPage.xaml.cs

using Billing.UI;
using Xamarin.Forms;

namespace Billing
{
    public partial class SplashPage : BillingPage
    {
        public SplashPage()
        {
            InitializeComponent();
        }

        protected override async void OnLoaded()
        {
            if (!string.IsNullOrEmpty(App.MainRoute))
            {
                await App.InitializeData();

                await Shell.Current.GoToAsync(App.MainRoute);
            }
        }
    }
}