void NamedItemList_BeforeInsert(object sender, InsertEventArgs <T> e)
{
if (_NameDict.ContainsKey(e.Item.Name))
{
throw new ArgumentException("Cant insert the INamedItem named {0}. The name does already exist in the collection.".Build(e.Item.Name));
}
}
void NamedItemList_AfterInsert(object sender, InsertEventArgs <T> e)
{
_NameDict.Add(e.Item.Name, e.Item);
e.Item.BeforeNameChange += new EventHandler <NameChangeEventArgs>(Item_BeforeNameChange);
e.Item.AfterNameChanged += new EventHandler <NameChangeEventArgs>(Item_AfterNameChanged);
}