For the current user
System.Environment.GetFolderPath(Environment.SpecialFolder.DesktopDirectory));
For the all users
System.Environment.GetFolderPath(Environment.SpecialFolder.CommonDesktopDirectory));
For the current user
System.Environment.GetFolderPath(Environment.SpecialFolder.DesktopDirectory));
For the all users
System.Environment.GetFolderPath(Environment.SpecialFolder.CommonDesktopDirectory));