[Flags]
enum Test
{
  Foo = 1,
  Bar = 2,
  Zot = 4,
  Some = 8,
  Foo1 = 64,
  Bar1 = 256
}
class Program
{
  public static void Main(string[] args)
  {
    var t1 = Test.Bar | Test.Some | Test.Bar1;
    var t2 = (Test)512;
    GetFlags(t1).ToList().ForEach(Console.WriteLine);
    Console.WriteLine("=======================");
    GetFlags(t2).ToList().ForEach(Console.WriteLine);
  }

  static IEnumerable<Enum> GetFlags(Enum input)
  {
    foreach (Enum value in Enum.GetValues(input.GetType()))
      if (input.HasFlag(value))
        yield return value;
  }
}