using System;

using System.Collections.Generic;

using System.Linq;      

​

public class Program

{

    public static void Main()

    {

        Status a = Status.All;

        var flags = Enum.GetValues(typeof(Status)).Cast<int>()       

                .Where(f=> ((Status)f)&a == (Status)f)

            .ToList();

        Console.WriteLine(flags);

    }

    [Flags]

    public enum Status

    {

        None = 0,

        One = 1,

        Two = 2,

        All = One | Two,

    }

​

​

}