using System;

public class Program

{

    public static void Main()

    {

        var userTypes = UserType.Internal | UserType.External;

        var userTypeICareAbout = UserType.Internal;

        Console.WriteLine(userTypes & userTypeICareAbout);

        if((userTypes & userTypeICareAbout) == UserType.Internal)

        {

            Console.WriteLine("It's in there.");

        }

        userTypeICareAbout = UserType.SystemUser;

        Console.WriteLine(userTypes & userTypeICareAbout);

    }

    private enum UserType

    {

        /// <summary>

        /// A Ryan Employee

        /// </summary>

        Internal = 1,

​

        /// <summary>

        /// A client user

        /// </summary>

        External = 2,

​

        /// <summary>

        /// A special system user, who is neither an employee nor a client nor a contact, but who

        /// sometimes performs updates and inserts as part of database seeding or updates.

        /// </summary>

        SystemUser = 4,

​

        /// <summary>

        /// An Appraiser is a third-party contact and is considered one of the "triple A" roles based on

        /// Appraiser, Auditor, Attorney.

        /// </summary>

        Appraiser = 8,

​

        /// <summary>

        /// An Attorney is a third-party contact and is considered one of the "triple A" roles based on

        /// Appraiser, Auditor, Attorney.

        /// </summary>

        Attorney = 16,

​

        /// <summary>

        /// An Auditor is a third-party contact and is considered one of the "triple A" roles based on

        /// Appraiser, Auditor, Attorney.

        /// </summary>

        Auditor = 32

    }

}