private void CreateCircle(Xamarin.Forms.Color borderColor = new Color(), double borderWidth = 3.0)
 {
     try
     {
         double min = Math.Min(Element.Width, Element.Height);
         Control.Layer.CornerRadius = (float)(min / 2.0);
         Control.Layer.MasksToBounds = false;
         Control.Layer.BorderColor = borderColor.ToCGColor();
         Control.Layer.BorderWidth = (float)borderWidth;
         Control.ClipsToBounds = true;
     }
     catch (Exception)
     {
         //Debug.WriteLine ("Unable to create circle image: " + ex);
     }
 }