Get Image from whole screen (BitmapSource)

GetScreenshot.cs

public class GetScreenshot{

  public static BitmapSource GetScreen(Rectangle coordinates) {
              int left = coordinates.Left;
              int top = coordinates.Top;
              int width = coordinates.Width;
              int height = coordinates.Height;

              using(var screenBmp = new Bitmap(width, height, System.Drawing.Imaging.PixelFormat.Format32bppArgb)) {
                  using(var bmpGraphics = Graphics.FromImage(screenBmp)) {
                      bmpGraphics.CopyFromScreen(left, top, 0, 0, new System.Drawing.Size(width, height));

                      IntPtr hBitmap = screenBmp.GetHbitmap();

                      BitmapSource ret = System.Windows.Interop.Imaging.CreateBitmapSourceFromHBitmap(
                          hBitmap,
                          IntPtr.Zero,
                          Int32Rect.Empty,
                          BitmapSizeOptions.FromEmptyOptions());

                      DeleteObject(hBitmap);

                      return ret;
                  }
              }
          }
      }