SingleOrDefault(TSource) Method (ParallelQuery(TSource))
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ParallelEnumerable.SingleOrDefault<TSource> Method (ParallelQuery<TSource>)

.NET Framework (current version)
 

Returns the only element of a parallel sequence, or a default value if the sequence is empty; this method throws an exception if there is more than one element in the sequence.

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

public static TSource SingleOrDefault<TSource>(
	this ParallelQuery<TSource> source
)

Parameters

source
Type: System.Linq.ParallelQuery<TSource>

The sequence to return the single element of.

Return Value

Type: TSource

The single element of the input sequence, or default() if the sequence contains no elements.

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 is a null reference (Nothing in Visual Basic).

AggregateException

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

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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