using System;

using System.Linq.Expressions;

using System.Threading.Tasks;

using System.Linq;

using System.Collections.Generic;

​

​

public class Program

{

    public static void Main(string[] args)

    {

        foreach(var a in GetAnimals(7))

            Console.WriteLine(a);

    }

    public static IEnumerable<Animals> GetAnimals(int i)

    {

        var animals = (Animals) i;

        foreach (Enum value in Enum.GetValues(animals.GetType()))

        if (animals.HasFlag(value))

            yield return (Animals) value;

    }

​

}

​

[Flags]

public enum Animals

{

    Cow = 1,

    Duck = 2,

    Goose = 4

}

​