Union(TSource) Method (ParallelQuery(TSource), ParallelQuery(TSource), IEqualityComparer(TSource))

Produces the set union of two parallel sequences by using a specified IEqualityComparer{T}.

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

Syntax

Visual Basic (Declaration)
Public Shared Function Union(Of TSource) ( _ first As ParallelQuery(Of TSource), _ second As ParallelQuery(Of TSource), _ comparer As IEqualityComparer(Of TSource) _ ) As ParallelQuery(Of TSource)

C#
public static ParallelQuery<TSource> Union<TSource>( ParallelQuery<TSource> first, ParallelQuery<TSource> second, IEqualityComparer<TSource> comparer )

first: Type: System.Linq..::.ParallelQuery<(Of <(TSource>)>)
A sequence whose distinct elements form the first set for the union.

second: Type: System.Linq..::.ParallelQuery<(Of <(TSource>)>)
A sequence whose distinct elements form the second set for the union.

comparer: Type: System.Collections.Generic..::.IEqualityComparer<(Of <(TSource>)>)
An IEqualityComparer<(Of <(T>)>) to compare values.

A sequence that contains the elements from both input sequences, excluding duplicates.

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