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ParallelEnumerable::Contains<TSource> Method (ParallelQuery<TSource>^, TSource, IEqualityComparer<TSource>^)
.NET Framework (current version)
Determines in parallel whether a sequence contains a specified element by using a specified IEqualityComparer<T>.
Assembly: System.Core (in System.Core.dll)
public: generic<typename TSource> [ExtensionAttribute] static bool Contains( ParallelQuery<TSource>^ source, TSource value, IEqualityComparer<TSource>^ comparer )
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::Booleantrue if the source sequence contains an element that has the specified value; otherwise, false.
Type Parameters
- TSource
The type of 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 8
.NET Framework
Available since 4.0
Portable Class Library
Supported in: portable .NET platforms
Windows Phone
Available since 8.1
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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