using System;

public class Program

{

    public static void Main()

    {

        IsSingleProtocol(Protocol.Http);        

        IsSingleProtocol(Protocol.Socks5);      

        IsSingleProtocol(Protocol.Http | Protocol.Socks5);

    }

        public static bool IsSingleProtocol(Protocol protocol)

        {return  protocol > 0 && (protocol & (protocol - 1)) != 0;}

[Flags]

    public enum Protocol

    {

        Http = 1,

        Socks5 = 2

    }

}

​