using System;

​

public class Program

{

    enum Numbers

    {

        One = 1,

        Two = 2,

        Three = One + Two,

        Four = Two + One + 1,

        Five = Two + 4 - 1

    }

​

    public static void Main()

    {

        foreach (Numbers number in Enum.GetValues(typeof (Numbers)))

            Console.WriteLine($"{number} ({number:D})");

    }

}