public void AddFrame(Image img, GIFQuality quality = GIFQuality.Default)
        {
            GifClass gif = new GifClass();
            gif.LoadGifPicture(img, quality);

            if (stream == null)
            {
                stream = new FileStream(FilePath, FileMode.Create, FileAccess.Write, FileShare.Read);
                stream.Write(CreateHeaderBlock());
                stream.Write(gif.ScreenDescriptor.ToArray());
                stream.Write(CreateApplicationExtensionBlock(Repeat));
            }

            stream.Write(CreateGraphicsControlExtensionBlock(Delay));
            stream.Write(gif.ImageDescriptor.ToArray());
            stream.Write(gif.ColorTable.ToArray());
            stream.Write(gif.ImageData.ToArray());

            FrameCount++;
        }
        public void AddFrame(Image img, GIFQuality quality = GIFQuality.Default)
        {
            GifClass gif = new GifClass();
            gif.LoadGifPicture(img, quality);

            if (stream == null)
            {
                stream = new FileStream(FilePath, FileMode.Create, FileAccess.Write, FileShare.Read);
                stream.Write(CreateHeaderBlock());
                stream.Write(gif.ScreenDescriptor.ToArray());
                stream.Write(CreateApplicationExtensionBlock(Repeat));
            }

            stream.Write(CreateGraphicsControlExtensionBlock(Delay));
            stream.Write(gif.ImageDescriptor.ToArray());
            stream.Write(gif.ColorTable.ToArray());
            stream.Write(gif.ImageData.ToArray());

            FrameCount++;
        }