/// <summary>
/// Get sequence of all elements in the collection in the keys order
/// </summary>
/// <returns>
/// <see cref="IDirectedEnumerable<V>"/>
/// </returns>
public IDirectedEnumerable <V> RangeAll()
{
return(new C5DirectedEnumerable <V>(new Util.DictionaryEnumerableValueAdapter <K, V>(_dictionary.RangeAll())));
}