How to get account type i.e admin or user in window 7

public bool IsAdmin ()
{
try
{
    var userCurrent = System.DirectoryServices.AccountManagement.UserPrincipal.Current;
    var Groups = userCurrent.GetAuthorizationGroups();

    var IsPotentialAdmin = Groups.Any(p => p.Sid == new SecurityIdentifier("S-1-5-32-544"));

    return IsPotentialAdmin;
}
catch (Exception ex)
{
    // this will cause access denied if user is not admin or in "Pre-Windows 2000 combatiblity" group
    return false;
}
}