DistinctByIterator< TSource, TKey >()

static IEnumerable< TSource > System.Linq.Enumerable.DistinctByIterator< TSource, TKey > ( IEnumerable< TSource > source, Func< TSource, TKey > keySelector, IEqualityComparer< TKey > comparer )

inlinestaticprivate

Definition at line 4594 of file Enumerable.cs.

    {
        using IEnumerator<TSource> enumerator = source.GetEnumerator();
        if (!enumerator.MoveNext())
        {
            yield break;
        }
        HashSet<TKey> set = new HashSet<TKey>(7, comparer);
        do
        {
            TSource current = enumerator.Current;
            if (set.Add(keySelector(current)))
            {
                yield return current;
            }
        }
        while (enumerator.MoveNext());
    }

References System.Add, System.comparer, System.Collections.Generic.Dictionary< TKey, TValue >.GetEnumerator(), System.Linq.keySelector, and System.Linq.source.