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ParallelEnumerable.Contains(Of TSource) Method (ParallelQuery(Of TSource), TSource)

Determines in parallel whether a sequence contains a specified element by using the default equality comparer.

Namespace:  System.Linq
Assemblies:   System.Linq.Parallel (in System.Linq.Parallel.dll)
  System.Core (in System.Core.dll)

'Declaration
<ExtensionAttribute> _
Public Shared Function Contains(Of TSource) ( _
	source As ParallelQuery(Of TSource), _
	value As TSource _
) As Boolean

Type Parameters

TSource

The type of elements of source.

Parameters

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

A sequence in which to locate a value.

value
Type: TSource

The value to locate in the sequence.

Return Value

Type: System.Boolean
true if the source sequence contains an element that has the specified value; otherwise, false.

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type ParallelQuery(Of TSource). When you use instance method syntax to call this method, omit the first parameter. For more information, see Extension Methods (Visual Basic) or Extension Methods (C# Programming Guide).

ExceptionCondition
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.

.NET Framework

Supported in: 4.6, 4.5, 4

.NET Framework Client Profile

Supported in: 4

Portable Class Library

Supported in: Portable Class Library

Supported in: Windows Phone 8.1
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