custom_IEnumerator_no_interface.cs

  class MyObjectEnumerator
  {
      public bool MoveNext()
      {
          throw new NotImplementedException();
      }

      public void Reset()
      {
          throw new NotImplementedException();
      }

      public MyObject Current { get; }

      public void Dispose()
      {
          throw new NotImplementedException();
      }
  }