ParallelEnumerable::Sum<TSource> Method (ParallelQuery<TSource>^, Func<TSource, Nullable<Int64>>^)
.NET Framework (current version)
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: generic<typename TSource> [ExtensionAttribute] static Nullable<long long> Sum( ParallelQuery<TSource>^ source, Func<TSource, Nullable<long long>>^ selector )
Parameters
- source
-
Type:
System.Linq::ParallelQuery<TSource>^
A sequence of values to calculate the sum of.
- selector
-
Type:
System::Func<TSource, Nullable<Int64>>^
A transform function to apply to each element.
Type Parameters
- TSource
The type of elements of source.
| 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 | The sum is larger than MaxValue. -or- One or more exceptions occurred during the evaluation of the query. |
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
Available since 8
.NET Framework
Available since 4.0
Portable Class Library
Supported in: portable .NET platforms
Windows Phone
Available since 8.1
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