public SyncFusionImageCropper(Stream Imagestream = null)
 {
     InitializeComponent();
     ImageCropper.SetToolbarItemVisibility("Back, Text, Add, TextColor, FontFamily, Arial, Noteworthy, Marker Felt, Bradley Hand, SignPainter, Opacity, Path, StrokeThickness, Colors, Opacity, Shape, Rectangle, StrokeThickness, Circle, Arrow, Undo, Redo, Effects, Hue, Saturation, Brightness, Contrast, Blur and Sharpen", false);
     ImageCropper.ToggleCropping(new Rectangle(20, 20, 20, 20));
     if (Imagestream == null)
     {
         ImageCropper.Source = ImageSource.FromUri(new Uri("http://photos2.insidercdn.com/iphone4scamera-111004-full.JPG"));
     }
     else
     {
         ImageCropper.Source = ImageSource.FromStream(() =>
         {
             return(Imagestream);
         });
     }
 }