Is there any way you could make this app go both ways? For example, making it possible to turn animations into spritesheets that are compatible with xna? Gamemaker 8 exports spritesheets, but I'm not sure about its compatibility with C# and xna. I've just started using xna and this would be so helpful, and I know a lot of xna users that are REALLY wanting this.[/quote:1nlointi]
I'm not working with XNA, but isn't there already some tools?
For example, Sprite Sheet Packer comes with an XNA exporter "which exports an XML file in XNA Content format" (quote from the description of the tool)