Taking Screenshots in WPF

Its Very Easy. Look Below:

public static byte[] GetPNGImage(UIElement source, double scale, int quality)
        {
            double actualHeight = source.RenderSize.Height;
            double actualWidth = source.RenderSize.Width;
            double renderHeight = actualHeight*scale;
            double renderWidth = actualWidth*scale;

            var renderTarget = new RenderTargetBitmap((int) renderWidth, (int) renderHeight, 96, 96, PixelFormats.Pbgra32);
            VisualBrush sourceBrush = new VisualBrush(source);

            DrawingVisual drawingVisual = new DrawingVisual();
            DrawingContext drawingContext = drawingVisual.RenderOpen();

            using (drawingContext)
            {
                drawingContext.PushTransform(new ScaleTransform(scale, scale));
                var myRect = new Rect(new System.Windows.Point(0, 0), new System.Windows.Point(actualWidth, actualHeight));
                drawingContext.DrawRectangle(sourceBrush, null, myRect);
            }
            renderTarget.Render(drawingVisual);
         
            JpegBitmapEncoder jpgEncoder = new JpegBitmapEncoder
            {
                QualityLevel = quality
            };
            jpgEncoder.Frames.Add(BitmapFrame.Create(renderTarget));

            Byte[] imageArray;

            using (var outputStream = new MemoryStream())
            {
                jpgEncoder.Save(outputStream);
                imageArray = outputStream.ToArray();
            }

            return imageArray;
        }

Dheeraj.