Xamarin.Forms MasterDetailPage custom render invalid cast exception

Question

I am writing a custom renderer for master detail page. And I get a invalid cast exception in the main activity.

 public class MainActivity : global::Xamarin.Forms.Platform.Android.FormsApplicationActivity
    {
        protected override void OnCreate(Bundle bundle)
        {
            //TabLayoutResource = Resource.Layout.Tabbar;
            //ToolbarResource = Resource.Layout.Toolbar;

            base.OnCreate(bundle);

            global::Xamarin.Forms.Forms.Init(this, bundle);
            LoadApplication(new App());
        }
    }


[assembly: ExportRenderer(typeof(Xamarin.Forms.MasterDetailPage), typeof(CustomRenderer))]
namespace App3.Droid.Renderer
{
    public class CustomRenderer : MasterDetailPageRenderer
    {

        public CustomRenderer(Context context) : base(context)
        {
        }
    }
}

Answer 1

I have made a simple demo for MasterDetailPage on github, you can refer to it to custom your MasterDetailPage.