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ParallelEnumerable.Zip<TFirst, TSecond, TResult> Method (ParallelQuery<TFirst>, ParallelQuery<TSecond>, Func<TFirst, TSecond, TResult>)

Merges in parallel two sequences by using the specified predicate function.

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

public static ParallelQuery<TResult> Zip<TFirst, TSecond, TResult>(
	this ParallelQuery<TFirst> first,
	ParallelQuery<TSecond> second,
	Func<TFirst, TSecond, TResult> resultSelector

Type Parameters


The type of the elements of the first sequence.


The type of the elements of the second sequence.


The type of the return elements.


Type: System.Linq.ParallelQuery<TFirst>

The first sequence to zip.

Type: System.Linq.ParallelQuery<TSecond>

The second sequence to zip.

Type: System.Func<TFirst, TSecond, TResult>

A function to create a result element from two matching elements.

Return Value

Type: System.Linq.ParallelQuery<TResult>
A sequence that has elements of type TResult that are obtained by performing resultSelector pairwise on two sequences. If the sequence lengths are unequal, this truncates to the length of the shorter sequence.

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type ParallelQuery<TFirst>. 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).


first or second or resultSelector is a null reference (Nothing in Visual Basic).


The query was canceled with the token passed in through WithCancellation.


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

.NET Framework

Supported in: 4.6, 4.5, 4

.NET Framework Client Profile

Supported in: 4

.NET for Windows Phone apps

Supported in: Windows Phone 8.1

Portable Class Library

Supported in: Portable Class Library
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