using System;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        var flaggedValues = GetFlaggedValues<MyEnum>(6);

        foreach(var val in flaggedValues){

            Console.WriteLine(val);

        }

    }

       public static IList<T> GetFlaggedValues<T>(int intValue) where T : struct, IConvertible

    {

​

        if (!typeof(T).IsEnum)

        {

            throw new ArgumentException("T must be an enumerated type");

        }

​

        IList<T> listToReturn = new List<T>();

        Enum enumToParse = Enum.Parse(typeof(T), intValue.ToString()) as Enum;

        foreach (T item in Enum.GetValues(typeof(T)))

        {

            var itemAsEnumValue = (Enum)Enum.Parse(typeof(T), item.ToString());

            if (enumToParse.HasFlag(itemAsEnumValue))

            {

                listToReturn.Add(item);

            }

        }

​

        return listToReturn;

    }

    [Flags]

    public enum MyEnum {

        A = 1,

        B = 2,

        C = 4,

        D = 8,

        E = 16

    }

}