public virtual Word AddWord(Word w)
{
if (!Words.Contains(w))
{
var vw = new VocabularyWords(this, w);
VwHelper.Add(vw);
w.AddVocWords(vw);
OnWordsChanged(new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Add, w));
}
return(w);
}
protected internal virtual void AddVocWords(VocabularyWords vw)
{
Contract.Requires(vw != null);
Contract.Requires(vw.Vocabulary.Words.Contains(this));
VwHelper.Add(vw);
}
