Andreas5 13 Junior Poster in Training Team Colleague

Hello

I am working on a Asp.net website where i can upload images. When i upload images i resize and save 3 different images: Original, Picture and a Thumbnail.

My problem is that when i resize .Gif images they just end up with ugly colours and without animation.

I had a hard time finding anything useful about this so do anyone know how to resize or work with the different frames in a .Gif?