ParallelEnumerable.ElementAtOrDefault(Of TSource) Method (ParallelQuery(Of TSource), Int32)

.NET Framework (current version)

Returns the element at a specified index in a parallel sequence or a default value if the index is out of range.

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

Public Shared Function ElementAtOrDefault(Of TSource) (
	source As ParallelQuery(Of TSource),
	index As Integer
) As TSource


Type: System.Linq.ParallelQuery(Of TSource)

A sequence to return an element from.

Type: System.Int32

The zero-based index of the element to retrieve.

Return Value

Type: TSource

default(TSource) if the index is outside the bounds of the source sequence; otherwise, the element at the specified position in the source sequence.

Type Parameters


The type of the elements of source.

Exception Condition

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


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


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
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