public static void FillBlobFromBitmapSource(this IWICImagingFactory factory, IWICBitmapSource source, IntPtr blob, int bufferStride, int bufferSize, Guid imageFormat)
{
IWICBitmapSource iwicbitmapSource = factory.ConvertFormat(source, imageFormat);
iwicbitmapSource.FillBlobFromBitmapSource(blob, bufferStride, bufferSize);
GraphicsInteropNativeMethods.SafeReleaseComObject(iwicbitmapSource);
}