using System;

public class Program

{

    public enum AAA

    {

        BBB = 1,

        CCC = 2

    }

    public class CCC

    {

        public AAA aaa { get;set;}

    }   

    public static void Main()

    {

        var cc = new CCC();

        cc.aaa = (AAA)3;

        Console.WriteLine((AAA)3);

    }

}