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
Assembly: 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.Booleantrue 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).| 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. |
Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
