ParallelEnumerable.Aggregate<'TSource, 'TAccumulate, 'TResult> Method (ParallelQuery<'TSource>, 'TAccumulate, Func<'TAccumulate, 'TSource, 'TAccumulate>, Func<'TAccumulate, 'TResult>)

.NET Framework (current version)
 

Applies in parallel an accumulator function over a sequence. The specified seed value is used as the initial accumulator value, and the specified function is used to select the result value.

Namespace:   System.Linq
Assembly:  System.Core (in System.Core.dll)

static member Aggregate<'TSource, 'TAccumulate, 'TResult> : 
        source:ParallelQuery<'TSource> *
        seed:'TAccumulate *
        func:Func<'TAccumulate, 'TSource, 'TAccumulate> *
        resultSelector:Func<'TAccumulate, 'TResult> -> 'TResult

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.

resultSelector
Type: System.Func<'TAccumulate, 'TResult>

A function to transform the final accumulator value into the result value.

Return Value

Type: TResult

The transformed final accumulator value.

Type Parameters

TSource

The type of the elements of source.

TAccumulate

The type of the accumulator value.

TResult

The type of the resulting value.

Exception Condition
OperationCanceledException

The query was canceled with the token passed in through WithCancellation.

ArgumentNullException

source or func or resultSelector 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.

Universal Windows Platform
Available since 8
.NET Framework
Available since 4.0
Portable Class Library
Supported in: portable .NET platforms
Windows Phone
Available since 8.1
Return to top
Show: