improved the forms designer

source/SkiaSharp.Views/SkiaSharp.Views.Desktop/SKControl.cs

@@ -6,6 +6,8 @@ using System.Windows.Forms;
 
 namespace SkiaSharp.Views.Desktop
 {
+	[DefaultEvent("PaintSurface")]
+	[DefaultProperty("Name")]
 	public class SKControl : Control
 	{
 		private readonly bool designMode;
@@ -20,8 +22,13 @@ namespace SkiaSharp.Views.Desktop
 			designMode = DesignMode || LicenseManager.UsageMode == LicenseUsageMode.Designtime;
 		}
 
+		[Bindable(false)]
+		[Browsable(false)]
+		[DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
+		[EditorBrowsable(EditorBrowsableState.Never)]
 		public SKSize CanvasSize => bitmap == null ? SKSize.Empty : new SKSize(bitmap.Width, bitmap.Height);
 
+		[Category("Appearance")]
 		public event EventHandler<SKPaintSurfaceEventArgs> PaintSurface;
 
 		protected override void OnPaint(PaintEventArgs e)

source/SkiaSharp.Views/SkiaSharp.Views.Desktop/SKGLControl.cs

@@ -5,6 +5,8 @@ using OpenTK;
 
 namespace SkiaSharp.Views.Desktop
 {
+	[DefaultEvent("PaintSurface")]
+	[DefaultProperty("Name")]
 	public class SKGLControl : GLControl
 	{
 		private readonly bool designMode;
@@ -19,10 +21,19 @@ namespace SkiaSharp.Views.Desktop
 			ResizeRedraw = true;
 		}
 
+		[Bindable(false)]
+		[Browsable(false)]
+		[DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
+		[EditorBrowsable(EditorBrowsableState.Never)]
 		public SKSize CanvasSize => new SKSize(renderTarget.Width, renderTarget.Height);
 
+		[Bindable(false)]
+		[Browsable(false)]
+		[DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
+		[EditorBrowsable(EditorBrowsableState.Never)]
 		public GRContext GRContext => grContext;
 
+		[Category("Appearance")]
 		public event EventHandler<SKPaintGLSurfaceEventArgs> PaintSurface;
 		
 		protected override void OnPaint(PaintEventArgs e)

source/SkiaSharp.Views/SkiaSharp.Views.WPF/SKElement.cs

@@ -11,6 +11,8 @@ using SkiaSharp.Views.Desktop;
 
 namespace SkiaSharp.Views.WPF
 {
+	[DefaultEvent("PaintSurface")]
+	[DefaultProperty("Name")]
 	public class SKElement : FrameworkElement
 	{
 		private readonly bool designMode;
@@ -23,6 +25,10 @@ namespace SkiaSharp.Views.WPF
 			designMode = DesignerProperties.GetIsInDesignMode(this);
 		}
 
+		[Bindable(false)]
+		[Browsable(false)]
+		[DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
+		[EditorBrowsable(EditorBrowsableState.Never)]
 		public SKSize CanvasSize => bitmap == null ? SKSize.Empty : new SKSize(bitmap.PixelWidth, bitmap.PixelHeight);
 
 		public bool IgnorePixelScaling
@@ -35,6 +41,7 @@ namespace SkiaSharp.Views.WPF
 			}
 		}
 
+		[Category("Appearance")]
 		public event EventHandler<SKPaintSurfaceEventArgs> PaintSurface;
 
 		protected override void OnRender(DrawingContext drawingContext)