What is the difference between
System.Drawing.Bitmap is an actual bitmap object. You can use it to draw to using a
Graphics instance obtained from it, you can display it on the screen, you can save the data to a file, etc.
System.Drawing.Imaging.BitmapData class is a helper object used when calling the
Bitmap.LockBits() method. It contains information about the locked bitmap, which you can use to inspect the pixel data within the bitmap.
You can't really "convert" between the two per se, as they don't represent the same information. You can obtain a
BitmapData object from a
Bitmap object simply by calling
LockBits(). If you have a
BitmapData object from some other
Bitmap object, you can copy that data to a new
Bitmap object by allocating one with the same format as the original, calling
LockBits on that one too, and then just copying the bytes from one to the other.