CSS Sprite equivalent in c# to map images in a sprite

Hi,

Is there an equivalent of CSS Sprite map for a image in C#? I have 20 images of same size, in a folder. Instead of loading each of them, I create a sprite and load one image, and create a image object for each of those 20 images and add to the form. Is there a standard library that does it? Are there any code samples for such scenario that work across all platforms?

Requirement is not for a game, so no Unity/XNA.

Thanks and regards,
Pooran