ParallelEnumerable.Join(Of TOuter, TInner, TKey, TResult) Method (ParallelQuery(Of TOuter), IEnumerable(Of TInner), Func(Of TOuter, TKey), Func(Of TInner, TKey), Func(Of TOuter, TInner, TResult), IEqualityComparer(Of TKey))

.NET Framework (current version)
 
System_CAPS_noteNote

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Note: This API is now obsolete.

This Join overload should never be called. This method is marked as obsolete and always throws NotSupportedException when invoked.

Namespace:   System.Linq
Assembly:  System.Core (in System.Core.dll)

<ExtensionAttribute>
<ObsoleteAttribute("The second data source of a binary operator must be of type System.Linq.ParallelQuery<T> rather than System.Collections.Generic.IEnumerable<T>. To fix this problem, use the AsParallel() extension method to convert the right data source to System.Linq.ParallelQuery<T>.")>
Public Shared Function Join(Of TOuter, TInner, TKey, TResult) (
	outer As ParallelQuery(Of TOuter),
	inner As IEnumerable(Of TInner),
	outerKeySelector As Func(Of TOuter, TKey),
	innerKeySelector As Func(Of TInner, TKey),
	resultSelector As Func(Of TOuter, TInner, TResult),
	comparer As IEqualityComparer(Of TKey)
) As ParallelQuery(Of TResult)

Parameters

outer
Type: System.Linq.ParallelQuery(Of TOuter)

This parameter is not used.

inner
Type: System.Collections.Generic.IEnumerable(Of TInner)

This parameter is not used.

outerKeySelector
Type: System.Func(Of TOuter, TKey)

This parameter is not used.

innerKeySelector
Type: System.Func(Of TInner, TKey)

This parameter is not used.

resultSelector
Type: System.Func(Of TOuter, TInner, TResult)

This parameter is not used.

comparer
Type: System.Collections.Generic.IEqualityComparer(Of TKey)

This parameter is not used.

Return Value

Type: System.Linq.ParallelQuery(Of TResult)

This overload always throws a NotSupportedException.

Type Parameters

TOuter

This type parameter is not used.

TInner

This type parameter is not used.

TKey

This type parameter is not used.

TResult

This type parameter is not used.

Exception Condition
NotSupportedException

The exception that occurs when this method is called.

This overload exists to disallow usage of Join with a left data source of type ParallelQuery(Of TSource) and a right data source of type IEnumerable(Of T). Otherwise, the Join operator would appear to be binding to the parallel implementation, but would in reality bind to the sequential implementation.

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
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