ParallelEnumerable::Average<TSource> Method (ParallelQuery<TSource>^, Func<TSource, Double>^)

.NET Framework (current version)

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

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

Syntax

C++

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

Parameters

source: Type: System.Linq::ParallelQuery<TSource>^
A sequence of values that are used to calculate an average.

selector: Type: System::Func<TSource, Double>^
A transform function to apply to each element.

Return Value

Type: System::Double

The average of the sequence of values.

Type Parameters

TSource: The type of elements of source.

Exceptions

Exception	Condition
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	One or more exceptions occurred during the evaluation of the query.
InvalidOperationException	source contains no elements.
OverflowException	(Thrown as inner exception in an AggregateException). The selector function returns a value greater than MaxValue for the element type.

Examples

Version Information

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