/// <summary>
/// Returns a dictionary with the same keys. For each key in the dictionary, the
/// value is obtained by calling <code>func(key, this[key])</code>.
/// </summary>
/// <param name="func">The function mapped.</param>
/// <returns>The resulting dictionary.</returns>
public TreeDictionary <TKey, TValue, TComparer> Map(Func <TKey, TValue, TValue> func)
{
if (Count == 0)
{
return(this);
}
return(Balanced(
func(_key, _value), _left.Map(func), _right.Map(func)));
}
