WPF

private async Task<System.Drawing.Bitmap> GetCaptureBitmap(CaptureFrame captureFrame)
       {
           VisualBrush brush = new VisualBrush(captureFrame);

           brush.Stretch = Stretch.Fill;
           brush.AlignmentX = AlignmentX.Left;
           brush.AlignmentY = AlignmentY.Top;
           brush.TileMode = TileMode.None;

           Rectangle rect = new Rectangle();
           rect.Width = Settings.Instance.Capture.Width;
           rect.Height = Settings.Instance.Capture.Height;
           rect.Fill = brush;

           rect.Measure(new Size(rect.Width, rect.Height));
           rect.Arrange(new Rect(0, 0, rect.Width, rect.Height));

           System.Windows.Media.Imaging.RenderTargetBitmap bmp = new System.Windows.Media.Imaging.RenderTargetBitmap((int)rect.Width, (int)rect.Height, 96, 96, PixelFormats.Pbgra32);

           bmp.Render(rect);

           FileStream stream = new FileStream(System.IO.Path.GetTempFileName(), FileMode.Create, FileAccess.ReadWrite, FileShare.Read, 4096, FileOptions.DeleteOnClose);
           System.Windows.Media.Imaging.BitmapEncoder encoder = new System.Windows.Media.Imaging.BmpBitmapEncoder();
           encoder.Frames.Add(System.Windows.Media.Imaging.BitmapFrame.Create(bmp));
           encoder.Save(stream);
           stream.Flush();

           System.Drawing.Bitmap bitmap = (System.Drawing.Bitmap)System.Drawing.Image.FromStream(stream, true, false);

           return bitmap;
       }

<Window x:Class="WpfApplication1.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:local="clr-namespace:WpfApplication1"
        Title="MainWindow" Height="350" Width="525">

    <Grid>
        <Label Content="{Binding Source={x:Static local:MainWindow.Age}}" />
        <Button Width="100" Height="100" Click="Button_Click" />
    </Grid>

</Window>

namespace WpfApplication1
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
        }

        private void Button_Click(object sender, RoutedEventArgs e)
        {
            age = age == 10 ? 11 : 10;
        }

        static int age = 10;
        public static int Age
        {
            get { return age; }
        }
    }
}