Fan.Sys.Map.hash C# (CSharp) Method

        public override long hash()
        {
            int hash = 0;
              IDictionaryEnumerator en = m_map.GetEnumerator();
              while (en.MoveNext())
              {
            object key = en.Key;
            object val = en.Value;
            hash += key.GetHashCode() ^ (val == null ? 0 : val.GetHashCode());
              }
              return hash;
        }