RxUIForms.App.xaml.cs

using System;
using RxUIForms.ViewModels;
using Xamarin.Forms;
using Xamarin.Forms.Xaml;
using Xamvvm;

[assembly: XamlCompilation(XamlCompilationOptions.Compile)]
namespace RxUIForms
{
    public partial class App : Application
    {
        public App()
        {
            InitializeComponent();

            var factory = new XamvvmFormsRxUIFactory(this);
            XamvvmCore.SetCurrentFactory(factory);

            MainPage = this.GetPageFromCache<AppShellViewModel>() as Page;
        }

        /* Omitted */
    }
}