public string GetString(char ItemSeparator, char ElemntSeparator)
        {
            KeyValPair kvp = new KeyValPair(ItemSeparator, ElemntSeparator);
            int        n   = this.Count;

            for (int i = 0; i < n; i++)
            {
                kvp.Add(GetKey(i), GetVal(i));
            }
            return(kvp.GetStr());
        }