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Showing content from https://learn.microsoft.com/en-us/dotnet/api/system.linq.parallelenumerable.thenby below:

ParallelEnumerable.ThenBy Method (System.Linq) | Microsoft Learn

Source:: ParallelEnumerable.cs

Source:: ParallelEnumerable.cs

Source:: ParallelEnumerable.cs

Source:: ParallelEnumerable.cs

Performs in parallel a subsequent ordering of the elements in a sequence in ascending order by using a specified comparer.

public:
generic <typename TSource, typename TKey>
[System::Runtime::CompilerServices::Extension]
 static System::Linq::OrderedParallelQuery<TSource> ^ ThenBy(System::Linq::OrderedParallelQuery<TSource> ^ source, Func<TSource, TKey> ^ keySelector, System::Collections::Generic::IComparer<TKey> ^ comparer);

public static System.Linq.OrderedParallelQuery<TSource> ThenBy<TSource,TKey>(this System.Linq.OrderedParallelQuery<TSource> source, Func<TSource,TKey> keySelector, System.Collections.Generic.IComparer<TKey> comparer);

public static System.Linq.OrderedParallelQuery<TSource> ThenBy<TSource,TKey>(this System.Linq.OrderedParallelQuery<TSource> source, Func<TSource,TKey> keySelector, System.Collections.Generic.IComparer<TKey>? comparer);

static member ThenBy : System.Linq.OrderedParallelQuery<'Source> * Func<'Source, 'Key> * System.Collections.Generic.IComparer<'Key> -> System.Linq.OrderedParallelQuery<'Source>

<Extension()>
Public Function ThenBy(Of TSource, TKey) (source As OrderedParallelQuery(Of TSource), keySelector As Func(Of TSource, TKey), comparer As IComparer(Of TKey)) As OrderedParallelQuery(Of TSource)

Type Parameters

TSource

The type of elements of source.

TKey

The type of the key returned by keySelector.

Parameters

keySelector: Func<TSource,TKey>

A function to extract a key from an element.

comparer: IComparer<TKey>

An IComparer{TKey} to compare keys.

Returns

An OrderedParallelQuery{TSource} whose elements are sorted according to a key.

Exceptions

source or keySelector is a null reference (Nothing in Visual Basic).

One or more exceptions occurred during the evaluation of the query.

Remarks

In contrast to the sequential implementation, this is not a stable sort. See the remarks for OrderBy for an approach to implementing a stable sort.