Where(TSource) Method (ParallelQuery(TSource), Func(TSource, Int32, Boolean))

Filters in parallel a sequence of values based on a predicate. Each element's index is used in the logic of the predicate function.

Namespace: System.Linq
Assembly: System.Threading (in System.Threading.dll)

Syntax

Visual Basic (Declaration)
Public Shared Function Where(Of TSource) ( _ source As ParallelQuery(Of TSource), _ predicate As Func(Of TSource, Integer, Boolean) _ ) As ParallelQuery(Of TSource)

C#
public static ParallelQuery<TSource> Where<TSource>( ParallelQuery<TSource> source, Func<TSource, int, bool> predicate )

source: Type: System.Linq..::.ParallelQuery<(Of <(TSource>)>)
A sequence to filter.

predicate: Type: System..::.Func<(Of <(TSource, Int32, Boolean>)>)
A function to test each element for a condition.

A sequence that contains elements from the input sequence that satisfy the condition.

Exception	Condition
System..::.ArgumentNullException	source or predicate is a null reference (Nothing in Visual Basic).