How to implement rounded corner for a button in xamarin form

public class NoRoundCornerButton : Button {  }  //In iOS Project [assembly: ExportRenderer(typeof(NoRoundCornerButton), typeof(NoRoundCornerButtonRenderer))]  namespace Test.iOS { public class NoRoundCornerButtonRenderer : ButtonRenderer { protected override void OnElementChanged(ElementChangedEventArgs e) { base.OnElementChanged(e); if (Control != null) { Control.Layer.CornerRadius = (nfloat) 0.0; } } } }