using System;

public class Program

{

    public static void Main()

    {

        var myChannel = NotificationChannel.MailAndTeams;

        if(myChannel.HasFlag(NotificationChannel.Email))

        Console.WriteLine("Mail");

        if(myChannel.HasFlag(NotificationChannel.Teams))

        Console.WriteLine("Teams");

        Console.WriteLine((int)NotificationChannel.MailAndTeams);

    }

    [Flags]

    public enum NotificationChannel

    {

        None = 0,

        Email = 1,

        Teams = 2,

        MailAndTeams = Email | Teams

    }

}