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ParallelEnumerable.Any(Of TSource) Method (ParallelQuery(Of TSource))

Determines whether a parallel sequence contains any elements.

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

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

Type Parameters

TSource

The type of elements of source.

Parameters

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

The sequence to check for emptiness.

Return Value

Type: System.Boolean
true if the source sequence contains any elements; 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.

This overload of the Any method causes a fully-buffered merge to be performed before the result is returned. The merge behavior can impact performance or cause an out of memory exception in large enumerables. To avoid the merge behavior, use the overload of Any that takes a Func parameter, or else use an alternative method such as FirstOrDefault.

.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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