NGif, Animated GIF Encoder for .NET

string _tempID = Path.GetFileNameWithoutExtension(_file);

string _path = String.Format(@"~/assets/images/temp/{0}/{1}", this.Session.SessionID, _tempID.ToString());
_path = Server.MapPath(_path);
if (!System.IO.Directory.Exists(_path))
	System.IO.Directory.CreateDirectory(_path);

GifDecoder _gifDecoder = new GifDecoder();
_gifDecoder.Read(_file);

for (int i = 0, count = _gifDecoder.GetFrameCount(); i < count; i++)
{
	System.Drawing.Image frame = _gifDecoder.GetFrame(i);  // frame i
	frame.Save(String.Format(@"{0}\{1}.png", _path, Guid.NewGuid().ToString()), ImageFormat.Png);
}

AnimatedGifEncoder _encoder = new AnimatedGifEncoder();
_encoder.SetTransparent(Color.Empty);

// make a memory stream to work with the image bytes
using (FileStream imageStream = 
	new FileStream( _path + @"\temp.gif" ,FileMode.OpenOrCreate, FileAccess.ReadWrite, FileShare.None))
{
	_encoder.Start(imageStream);
	_encoder.SetDelay(_gifDecoder.GetDelay(0)); // time between images			
	_encoder.SetRepeat(0); //-1:no repeat,0:always repeat

	string[] _imagePaths = System.IO.Directory.GetFiles(_path, "*.png");

	for (int i = 0, count = _imagePaths.Length; i < count; i++)
		_encoder.AddFrame(this.resize(_imagePaths[i], newWidth, newHeight, _increaseImageSize));

	// make byte array the same size as the image
	byte[] imageContent = new Byte[imageStream.Length];

	// rewind the memory stream
	imageStream.Position = 0;

	// load the byte array with the image
	imageStream.Read(imageContent, 0, (int)imageStream.Length);

	// return byte array to caller with image type
	this.Response.ContentType = _contentType;
	this.Response.AddHeader("content-length", System.Convert.ToString(imageStream.Length));

	this.Response.BinaryWrite(imageContent);
}

try
{
  foreach (string _f in System.IO.Directory.GetFiles(_path))
    System.IO.File.Delete(_f);

  System.IO.Directory.Delete(_path);
  System.IO.Directory.Delete(System.IO.Directory.GetParent(_path).ToString());
}
catch (Exception _ex) { Console.Write(_ex.ToString());}

_encoder.Finish();

_encoder = null;
_gifDecoder = null;

this.Response.End();