public TValue GetValueOrCreate(TKey key, Func <TKey, TValue> factory)
{
return(IDictionaryExtensions.GetValueOrCreate(_key2ValueDictionary, key, factory));
}
public TKey GetKeyOrCreate(TValue value, Func <TValue, TKey> factory)
{
return(IDictionaryExtensions.GetValueOrCreate(_value2KeyDictionary, value, factory));
}