Was this page helpful?
Your feedback about this content is important. Let us know what you think.
Additional feedback?
1500 characters remaining
Export (0) Print
Expand All

ParallelEnumerable::Sum<TSource> Method (ParallelQuery<TSource>, Func<TSource, Single>)

Computes in parallel the sum of the sequence of values that are obtained by invoking a transform function on each element of the input sequence.

Namespace:  System.Linq
Assemblies:   System.Linq.Parallel (in System.Linq.Parallel.dll)
  System.Core (in System.Core.dll)

[ExtensionAttribute]
public:
generic<typename TSource>
static float Sum(
	ParallelQuery<TSource>^ source, 
	Func<TSource, float>^ selector
)

Type Parameters

TSource

The type of elements of source.

Parameters

source
Type: System.Linq::ParallelQuery<TSource>

A sequence of values to calculate the sum of.

selector
Type: System::Func<TSource, Single>

A transform function to apply to each element.

Return Value

Type: System::Single
The sum of the projected values in the sequence.

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type ParallelQuery<TSource>. When you use instance method syntax to call this method, omit the first parameter. For more information, see Extension Methods (Visual Basic) or Extension Methods (C# Programming Guide).

ExceptionCondition
OperationCanceledException

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

ArgumentNullException

source or selector is a null reference (Nothing in Visual Basic).

AggregateException

The sum is larger than MaxValue. -or- One or more exceptions occurred during the evaluation of the query.

.NET Framework

Supported in: 4.6, 4.5, 4

.NET Framework Client Profile

Supported in: 4

.NET for Windows Phone apps

Supported in: Windows Phone 8.1

Portable Class Library

Supported in: Portable Class Library
Show:
© 2015 Microsoft