Csharp/C Sharp by API/System.Security.Principal/IPrincipal

IPrincipal.IsInRole

   
using System;
using System.Threading;
using System.Collections.Generic;
using System.IO;
using System.IO.IsolatedStorage;
using System.Net;
using System.Net.Sockets;
using System.Reflection;
using System.Security;
using System.Security.AccessControl;
using System.Security.Policy;
using System.Security.Permissions;
using System.Security.Principal;
using System.Text;
public class MainClass
{
    public static void Main()
    {
        IPrincipal user = Thread.CurrentPrincipal;
        if (!user.IsInRole("Administrators"))
            Console.WriteLine("User not in the "admin" role");
        else
            Console.WriteLine("User is an "admin"");
    }
}