Also, if you have vista. it wont compile unless you give yourself either general write access to the directory or run the program as administrator.
The safest thing she can do to make it so Vista people don't always have to run the program in admin mode, is to make the *.cs files compile in the users %temp% directory.
Code:
using System.IO;
public static string tempPath = Path.GetTempPath();
I think you need system.io, but its a bit fuzzy on what exact one i needed.