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Draw Buttons On Bitmap

using System; using System.Windows; using System.Windows.Controls; using System.Windows.Controls.Primitives; using System.Windows.Input; using System.Windows.Media; using System.Windows.Media.Imaging;     public class DrawButtonsOnBitmap : Window     {         [STAThread]         public static void Main()         {             Application app = new Application();             app.Run(new DrawButtonsOnBitmap());         }         public DrawButtonsOnBitmap()         {             UniformGrid unigrid = new UniformGrid();             unigrid.Columns = 4;             for (int i = 0; i < 32; i++)             {                 ToggleButton btn = new ToggleButton();                 btn.Width = 96;                 btn.Height = 24;                 btn.IsChecked = true;                 unigrid.Children.Add(btn);             }             unigrid.Measure(new Size(Double.PositiveInfinity,Double.PositiveInfinity));             Size szGrid = unigrid.DesiredSize;             unigrid.Arrange(new Rect(new Point(0, 0), szGrid));             RenderTargetBitmap renderbitmap = new RenderTargetBitmap((int)Math.Ceiling(szGrid.Width),                                        (int)Math.Ceiling(szGrid.Height),                                        96, 96, PixelFormats.Default);             renderbitmap.Render(unigrid);             Image img = new Image();             img.Source = renderbitmap;             Content = img;         }     }