GetOneWithPossibleDefault< TSource >()

static TSource System.Linq.ParallelEnumerable.GetOneWithPossibleDefault< TSource > ( QueryOperator< TSource > queryOp, bool throwIfTwo, bool defaultIfEmpty )

inlinestaticprivate

Definition at line 1935 of file ParallelEnumerable.cs.

    {
        using (IEnumerator<TSource> enumerator = queryOp.GetEnumerator(ParallelMergeOptions.FullyBuffered))
        {
            if (enumerator.MoveNext())
            {
                TSource current = enumerator.Current;
                if (throwIfTwo && enumerator.MoveNext())
                {
                    throw new InvalidOperationException(System.SR.MoreThanOneMatch);
                }
                return current;
            }
        }
        if (defaultIfEmpty)
        {
            return default(TSource);
        }
        throw new InvalidOperationException(System.SR.NoElements);
    }

References System.Collections.Generic.Dictionary< TKey, TValue >.GetEnumerator(), System.SR.MoreThanOneMatch, and System.SR.NoElements.