How to copy file/folder to some other location.

Question

Hi, i need to know , how to move or copy a file/folder to some other location. say source is C:\MyFolder and destnation is D:\ now if i move MyFolder from C to D , i don't find any way or method in System.IO.Directory such as Copy, Move is provided but has the restriction of Volume( can't move to different volume, volume should remain same). Please help me out Thanx