PerformSequentialAggregation< TSource, TAccumulate >()

static TAccumulate System.Linq.ParallelEnumerable.PerformSequentialAggregation< TSource, TAccumulate > ( this ParallelQuery< TSource > source, TAccumulate seed, bool seedIsSpecified, Func< TAccumulate, TSource, TAccumulate > func )

inlinestaticprivate

Definition at line 598 of file ParallelEnumerable.cs.

    {
        using IEnumerator<TSource> enumerator = source.GetEnumerator();
        TAccumulate val;
        if (seedIsSpecified)
        {
            val = seed;
        }
        else
        {
            if (!enumerator.MoveNext())
            {
                throw new InvalidOperationException(System.SR.NoElements);
            }
            val = (TAccumulate)(object)enumerator.Current;
        }
        while (enumerator.MoveNext())
        {
            TSource current = enumerator.Current;
            try
            {
                val = func(val, current);
            }
            catch (Exception ex)
            {
                throw new AggregateException(ex);
            }
        }
        return val;
    }

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