LastOrDefault(TSource) Method (ParallelQuery(TSource), Func(TSource, Boolean))
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ParallelEnumerable.LastOrDefault(Of TSource) Method (ParallelQuery(Of TSource), Func(Of TSource, Boolean))

.NET Framework (current version)
 

Returns the last element of a parallel sequence that satisfies a condition, or a default value if no such element is found.

Namespace:   System.Linq
Assembly:  System.Core (in System.Core.dll)

<ExtensionAttribute>
Public Shared Function LastOrDefault(Of TSource) (
	source As ParallelQuery(Of TSource),
	predicate As Func(Of TSource, Boolean)
) As TSource

Parameters

source
Type: System.Linq.ParallelQuery(Of TSource)

The sequence to return an element from.

predicate
Type: System.Func(Of TSource, Boolean)

A function to test each element for a condition.

Return Value

Type: TSource

default() if the sequence is empty or if no elements pass the test in the predicate function; otherwise, the last element that passes the test in the predicate function.

Type Parameters

TSource

The type of the elements of source.

Exception Condition
OperationCanceledException

The query was canceled with the token passed in through WithCancellation.

ArgumentNullException

source or predicate is a null reference (Nothing in Visual Basic).

AggregateException

One or more exceptions occurred during the evaluation of the query.

If the query is not ordered, then the last element is non-deterministic. For more information, see Order Preservation in PLINQ.

Universal Windows Platform
Available since 4.5
.NET Framework
Available since 4.0
Portable Class Library
Supported in: portable .NET platforms
Windows Phone
Available since 8.1
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