ParallelEnumerable::Average<TSource> Method (ParallelQuery<TSource>^, Func<TSource, Nullable<Int32>>^)
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.
Assembly: System.Core (in System.Core.dll)
public: generic<typename TSource> [ExtensionAttribute] static Nullable<double> Average( ParallelQuery<TSource>^ source, Func<TSource, Nullable<int>>^ selector )
A sequence of values that are used to calculate an average.
The type of elements of source.
The query was canceled with the token passed in through WithCancellation.
source or selector is a null reference (Nothing in Visual Basic).
The sum or count of the elements in the sequence is larger than MaxValue. -or- One or more exceptions occurred during the evaluation of the query.
source contains no elements.
(Thrown as inner exception in an AggregateException). The selector function returns a value greater than MaxValue for the element type.
Available since 4.5
Available since 4.0
Portable Class Library
Supported in: portable .NET platforms
Available since 8.1