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.
Assemblies: System.Linq.Parallel (in System.Linq.Parallel.dll)
System.Core (in System.Core.dll)
[ExtensionAttribute] public: generic<typename TSource> static Nullable<double> Average( ParallelQuery<TSource>^ source, Func<TSource, Nullable<int>>^ selector )
The type of elements of source.
- Type: System.Linq::ParallelQuery<>
A sequence of values that are used to calculate an average.
Usage NoteIn Visual Basic and C#, you can call this method as an instance method on any object of type ParallelQuery<>. 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).
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.