public static void Save(string Output)
        {
            System.Windows.Media.Imaging.GifBitmapEncoder G = new System.Windows.Media.Imaging.GifBitmapEncoder();

            List <System.IO.FileStream> X = new List <System.IO.FileStream>();

            foreach (string Fi in Directory.GetFiles(tempDir, "*.png", SearchOption.TopDirectoryOnly))
            {
                System.IO.FileStream TempStream = new System.IO.FileStream(Fi, System.IO.FileMode.Open);
                System.Windows.Media.Imaging.BitmapFrame Frame = System.Windows.Media.Imaging.BitmapFrame.Create(TempStream);
                X.Add(TempStream);
                G.Frames.Add(Frame);
            }
            System.IO.FileStream FS = new System.IO.FileStream(Output, System.IO.FileMode.OpenOrCreate);
            G.Save(FS);
            FS.Close();

            foreach (System.IO.FileStream St in X)
            {
                St.Close();
            }
        }