Hi Dave,

You can get CurrentPrincipal.Identity.Name and check the domain name, if
it's equal to current computer name, it's a local user; otherwise it's a
domain user:

       static bool IsDomainUser()
       {
           
AppDomain.CurrentDomain.SetPrincipalPolicy(PrincipalPolicy.WindowsPrincipal)
;
           string fullname = Thread.CurrentPrincipal.Identity.Name;
           int i = fullname.LastIndexOf('\\');
           if (i > 0)
           {
               string domain = fullname.Substring(0, i);
               return string.Compare(domain, Environment.MachineName,
true) != 0;
           }
           return false;
       }

Sincerely,
Walter Wang (wawang@online.microsoft.com, remove 'online.')
Microsoft Online Community Support

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