public override void Render(IDrawingContext drawingContext) { drawingContext.FillRoundedRectangle(Background, VisualBounds, new CornerRadius(CornerRadius)); drawingContext.DrawRoundedRectangle(new Pen(BorderBrush, BorderThickness), VisualBounds, new CornerRadius(CornerRadius)); base.Render(drawingContext); }