what is the difference between class bitmap and graphics in ASP.NET?

Graphics is like pen and Bitmap is like paper. You use Graphics/pen to draw on Bitmap/paper.

thank you! It can't be more visualized!

I don't know how accurate it is, though

Bitmap is an Image, which you can manipulate through your Graphics class

Graphics has all the methods for manipulation: DrawLine, DrawRect, FillRect, etc.

So, you manipulate an image (Bitmap) via its Graphics property

Also, Bitmap is an image format (how you would store or retrieve a stored image).

Hope this helps

thanks