Fan.Sys.List.unique C# (CSharp) Method

        public List unique()
        {
            Hashtable dups = new Hashtable(m_size*3);
              List acc = new List(m_of, m_size);
              bool hasNull = false;
              for (int i=0; i<m_size; i++)
              {
            object v = m_values[i];
            if (v == null && !hasNull)
            {
              hasNull = true;
              acc.add(v);
            }
            else if (v != null && dups[v] == null)
            {
              dups[v] = this;
              acc.add(v);
            }
              }
              return acc;
        }