ParallelEnumerable.ThenBy<TSource, TKey> Method (OrderedParallelQuery<TSource>, Func<TSource, TKey>)
Performs in parallel a subsequent ordering of the elements in a sequence in ascending order according to a key.
Assembly: System.Core (in System.Core.dll)
public static OrderedParallelQuery<TSource> ThenBy<TSource, TKey>( this OrderedParallelQuery<TSource> source, Func<TSource, TKey> keySelector )
Parameters
- source
-
Type:
System.Linq.OrderedParallelQuery<TSource>
An OrderedParallelQuery{TSource} that contains elements to sort.
- keySelector
-
Type:
System.Func<TSource, TKey>
A function to extract a key from an element.
Return Value
Type: System.Linq.OrderedParallelQuery<TSource>An OrderedParallelQuery{TSource} whose elements are sorted according to a key.
Type Parameters
- TSource
The type of elements of source.
- TKey
The type of the key returned by keySelector.
| Exception | Condition |
|---|---|
| ArgumentNullException | source or keySelector is a null reference (Nothing in Visual Basic). |
| OperationCanceledException | The query was canceled with the token passed in through WithCancellation. |
| AggregateException | One or more exceptions occurred during the evaluation of the query. |
In contrast to the sequential implementation, this is not a stable sort. See the remarks for OrderBy<TSource, TKey> for an approach to implementing a stable sort.
Available since 8
.NET Framework
Available since 4.0
Portable Class Library
Supported in: portable .NET platforms
Windows Phone
Available since 8.1