ParallelEnumerable::Join<TOuter, TInner, TKey, TResult> Method (ParallelQuery<TOuter>^, IEnumerable<TInner>^, Func<TOuter, TKey>^, Func<TInner, TKey>^, Func<TOuter, TInner, TResult>^, IEqualityComparer<TKey>^)
This Join overload should never be called. This method is marked as obsolete and always throws NotSupportedException when invoked.
Assembly: System.Core (in System.Core.dll)
public: generic<typename TOuter, typename TInner, typename TKey, typename TResult> [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>.")] static ParallelQuery<TResult>^ Join( ParallelQuery<TOuter>^ outer, IEnumerable<TInner>^ inner, Func<TOuter, TKey>^ outerKeySelector, Func<TInner, TKey>^ innerKeySelector, Func<TOuter, TInner, TResult>^ resultSelector, IEqualityComparer<TKey>^ comparer )
Parameters
- outer
-
Type:
System.Linq::ParallelQuery<TOuter>^
This parameter is not used.
- inner
-
Type:
System.Collections.Generic::IEnumerable<TInner>^
This parameter is not used.
- outerKeySelector
-
Type:
System::Func<TOuter, TKey>^
This parameter is not used.
- innerKeySelector
-
Type:
System::Func<TInner, TKey>^
This parameter is not used.
- resultSelector
-
Type:
System::Func<TOuter, TInner, TResult>^
This parameter is not used.
- comparer
-
Type:
System.Collections.Generic::IEqualityComparer<TKey>^
This parameter is not used.
Return Value
Type: System.Linq::ParallelQuery<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<TSource> and a right data source of type IEnumerable<T>. Otherwise, the Join operator would appear to be binding to the parallel implementation, but would in reality bind to the sequential implementation.
Available since 8
.NET Framework
Available since 4.0
Portable Class Library
Supported in: portable .NET platforms
Windows Phone
Available since 8.1