/// <summary>
/// </summary>
/// <param name="child"> </param>
public void AddGroup(StatGroup child)
{
if (ChildContainer.TryAdd(child.Name, child))
{
DoCollectionChanged(NotifyCollectionChangedAction.Add, child);
}
}
public void Add(HistoryGroup item)
{
ChildContainer.TryAdd(item.Name, item);
}