TIme and Date

The best way to do this is to call the Win32 API function SetSystemTime and pass it a SYSTEMTIME struct, by reference, containing the new date/time.

I found a SO thread here showing how to do this:

http://stackoverflow.com/questions/650849/change-system-date-programatically

You'll also need to add the following 'using' directive to your file:

   using System.Runtime.InteropServices;

Note that if you're using Windows Vista or later you'll need administrative privileges to call this function.