What is the best way to resize an animated GIF image?

Question

In my project, i need to help people to reduce the size of image. I have created an image resize method which work well for almost image format but not animated GIF!!

Therefore, i want someone to help me to make it :)

I have designed the process of how to resize an animated GIF:

1. get the image in byte data=>

2. split the frame of GIF to Image array =>

3. resize each Image of the array =>

4. combine those images to one GIF image =>

5. convert the GIF image to byte data =>

6. upload the byte data to cloud

I am not asking what is the code to do this, but asking is it possible?

My design code:

static void Main(string[] args)
{
   Image gifimage = getImageFromByte();  //created
   Image[] images = GetFramesFromAnimatedGIF(gifimage); //creating
   for (int i=0; i< images.Length;i++)
   {
       images[i] = resize(img, size); //created
   }
   Image combinedImg = combineImgArrToImg(images); // not create yet
   byte[] imgData = convertImgToData(combinedImg); // created
   uploadImg(imgData);  //created
}

About the GetFramesFromAnimatedGIF method, it is:

 public static Image[] GetFramesFromAnimatedGIF(Image IMG)
 {
    List<Image> IMGs = new List<Image>();
    int Length = IMG.GetFrameCount(FrameDimension.Time);

    for (int i = 0; i < Length; i++)
    {
        IMG.SelectActiveFrame(FrameDimension.Time, i);
        IMGs.Add(new Bitmap(IMG));
    }

    return IMGs.ToArray();
}