standamikes

using Xamarin.Forms;

namespace YourProject.Core.Effects
{
  public class FrameCornerRadius : RoutingEffect
  {
    public FrameCornerRadius() 
      : base("YourProject.FrameCornerRadiusEffect")
    {
    }

standamikes

using Android.Content;
using Android.Content.Res;
using Android.Graphics.Drawables;
using System;
using System.Threading.Tasks;
using YourProject.Droid.Renderers;
using Xamarin.Forms;
using Xamarin.Forms.Platform.Android;

[assembly: ExportRenderer(typeof(Button), typeof(CustomButtonRenderer))]