Thumbnails and photo size over Windows Mobile

Considering the different sizes of the screen on Windows Mobile devices, which should be the ideal size of a photo that I'm going to show on my WinForm application?

And what about thumbnai开发者_StackOverflow中文版l? Is there any kind of algorithm to make thumbnail of the images that I'm going to show?

Showing photo is depending on your mobile screen resolution and u just have look at default picture control you will get some idea.

you can generate thumbnails first, keep them in separate folder of particular folder,if necessary load them and display.