Try:
System.Environment.GetEnvironmentVariable("USERPROFILE");
Edit:
If the version of .NET you are using is 4 or above, you can use the Environment.SpecialFolder
enumeration:
Environment.GetFolderPath(Environment.SpecialFolder.UserProfile);
Try:
System.Environment.GetEnvironmentVariable("USERPROFILE");
Edit:
If the version of .NET you are using is 4 or above, you can use the Environment.SpecialFolder
enumeration:
Environment.GetFolderPath(Environment.SpecialFolder.UserProfile);