Useful .Net classes people forget to use

Phil Haack wrote a post on .Net services people frequently tend to forget about the re-invent, so I made a list of his pointers as well as some of the comments:

1. System.IO.Path.Combine(folder, filename)
2. string.IsNullOrEmpty(string)
3. Path.DirectorySeparatorChar
4. Path.GetFileName(fullPath)
5. Environment.NewLine
6. Path.GetTempFileName()
7. System.Diagnostics.Stopwatch
8. System.Net.NetworkInformation.NetworkChange
9. System.Web.VirtualPathUtility
10. System.Web.HttpUtility