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ParallelEnumerable::Contains<TSource> Method (ParallelQuery<TSource>, TSource, IEqualityComparer<TSource>)

Determines in parallel whether a sequence contains a specified element by using a specified IEqualityComparer<T>.

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

[ExtensionAttribute]
public:
generic<typename TSource>
static bool Contains(
	ParallelQuery<TSource>^ source, 
	TSource value, 
	IEqualityComparer<TSource>^ comparer
)

Type Parameters

TSource

The type of elements of source.

Parameters

source
Type: System.Linq::ParallelQuery<TSource>

A sequence in which to locate a value.

value
Type: TSource

The value to locate in the sequence.

comparer
Type: System.Collections.Generic::IEqualityComparer<TSource>

An equality comparer to compare values.

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<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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