How to empty the recycle bin using C#

static extern uint SHEmptyRecycleBin(IntPtr hwnd, string rootPath,
                                      RecycleBinFlags flags);
 enum RecycleBinFlags : uint
     {
     NOCONFIRMATION = 0x00000001,
     NOPROGRESSUI = 0x00000002,
     NOSOUND = 0x00000004
     }

uint result = SHEmptyRecycleBin(IntPtr.Zero,
                                null,
                                RecycleBinFlags.NOCONFIRMATION | RecycleBinFlags.NOPROGRESSUI);