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());
}