C# Example Bitmask Implementation

Bitmask.cs

using System;

namespace BitmaskTest
{
    [Flags]
    public enum Names
    {
        NoOne = 0,
        Tim = 1,
        Alfred = 2,
        Michelle = 4,
        Jon = 8,
    }

    class Program
    {
        static void Main(string[] args)
        {
            MethodWithBitmask(Names.Tim | Names.Jon);
        }

        static void MethodWithBitmask(Names names)
        {
            bool timIsThere = (names & Names.Tim) != Names.NoOne;
            bool alfredIsThere = (names & Names.Alfred) != Names.NoOne;
            bool jonIsThere = (names & Names.Jon) != Names.NoOne;

            Console.WriteLine($"Tim is there: {timIsThere}");
            Console.WriteLine($"Alfred is there: {alfredIsThere}");
            Console.WriteLine($"Jon is there: {jonIsThere}");
        }
    }
}