ParallelEnumerable.Sum<TSource> Method (ParallelQuery<TSource>, Func<TSource, Int64>)
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.
Assembly: System.Core (in System.Core.dll)
public static long Sum<TSource>( this ParallelQuery<TSource> source, Func<TSource, long> selector )
A sequence of values to calculate the sum of.
Return ValueType: System.Int64
The sum of the projected values in the sequence.
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 is larger than MaxValue. -or- One or more exceptions occurred during the evaluation of the query.
Available since 8
Available since 4.0
Portable Class Library
Supported in: portable .NET platforms
Available since 8.1