/// <summary>
/// Adds object to the set, preserving order.
/// </summary>
public bool Add(object key)
{
if (key == null)
{
return(false);
}
RbTree.InsertResult result = _tree.Insert(key, _allowDuplicates, true);
if (result.NewNode)
{
++_count;
}
return(result.NewNode);
}
/// <summary>
/// Adds object to the set only if the set contains no equal object(s).
/// </summary>
public bool AddIfNotContains(object key)
{
if (key == null)
{
return(false);
}
RbTree.InsertResult result = _tree.Insert(key, false, false);
if (result.NewNode)
{
++_count;
}
return(result.NewNode);
}