ParallelEnumerable::Aggregate<TSource, TAccumulate> Method (ParallelQuery<TSource>^, TAccumulate, Func<TAccumulate, TSource, TAccumulate>^)
Applies in parallel an accumulator function over a sequence. The specified seed value is used as the initial accumulator value.
Assembly: System.Core (in System.Core.dll)
public: generic<typename TSource, typename TAccumulate> [ExtensionAttribute] static TAccumulate Aggregate( ParallelQuery<TSource>^ source, TAccumulate seed, Func<TAccumulate, TSource, TAccumulate>^ func )
Parameters
- source
-
Type:
System.Linq::ParallelQuery<TSource>^
A sequence to aggregate over.
- seed
-
Type:
TAccumulate
The initial accumulator value.
- func
-
Type:
System::Func<TAccumulate, TSource, TAccumulate>^
An accumulator function to be invoked on each element.
Return Value
Type: TAccumulateThe final accumulator value.
Type Parameters
- TSource
The type of the elements of source.
- TAccumulate
The type of the accumulator value.
| Exception | Condition |
|---|---|
| OperationCanceledException | The query was canceled with the token passed in through WithCancellation. |
| ArgumentNullException | source or func is a null reference (Nothing in Visual Basic). |
| AggregateException | One or more exceptions occurred during the evaluation of the query. |
| InvalidOperationException | source contains no elements. |
Available since 8
.NET Framework
Available since 4.0
Portable Class Library
Supported in: portable .NET platforms
Windows Phone
Available since 8.1