ParallelEnumerable.Sum(Of TSource) Method (ParallelQuery(Of TSource), Func(Of TSource, Nullable(Of Int32)))
.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)
<ExtensionAttribute> Public Shared Function Sum(Of TSource) ( source As ParallelQuery(Of TSource), selector As Func(Of TSource, Nullable(Of Integer)) ) As Nullable(Of Integer)
Parameters
- source
-
Type:
System.Linq.ParallelQuery(Of TSource)
A sequence of values to calculate the sum of.
- selector
-
Type:
System.Func(Of TSource, Nullable(Of Int32))
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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