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MSDN Library

ParallelEnumerable::Max<TSource> Method (ParallelQuery<TSource>, Func<TSource, Nullable<Int64>>)

Invokes in parallel a transform function on each element of a sequence and returns the maximum value.

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

generic<typename TSource>
static Nullable<long long> Max(
	ParallelQuery<TSource>^ source, 
	Func<TSource, Nullable<long long>>^ selector

Type Parameters


The type of elements of source.


Type: System.Linq::ParallelQuery<TSource>

A sequence of values to determine the maximum value of.

Type: System::Func<TSource, Nullable<Int64>>

A transform function to apply to each element.

Return Value

Type: System::Nullable<Int64>
The maximum value in the sequence.

Usage Note

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


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


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


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


source contains no elements.

.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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