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    private static string getRole()
    {
        string role = String.Empty;

        AppDomain.CurrentDomain.SetPrincipalPolicy(PrincipalPolicy.WindowsPrincipal);
        WindowsPrincipal windowsPrincipal = (Thread.CurrentPrincipal as WindowsPrincipal);

        try
        {
            switch (windowsPrincipal.IsInRole)
            {
                case WindowsBuiltInRole.Administrator:
                    role = "Admin";
                    break;
                case WindowsBuiltInRole.User:
                    role = "User";
                    break;
            }

        }
        catch (Exception exception)
        {
               Console.WriteLine(exception.Message);
        }    
 
        return role;					

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            if (windowsPrincipal.IsInRole(WindowsBuiltInRole.Administrator))
                return "Admin";

            if (windowsPrincipal.IsInRole(WindowsBuiltInRole.Guest))
                return "Gast";