GroupJoin<T2,TResult>(IEnumerable<T2>,Func<T2,TKey>,Func<IEnumerable<T>,T2,TResult>) Method

In This Topic

Correlates the items of this indexed collection with the items of another sequence and groups the results by the item of the second sequence.

Implements IIndexScanner(T,TKey).GroupJoin

Syntax

Visual Basic
C#

'Declaration
 
Public Overloads Function GroupJoin
    (Of T2,TResult)( _
   ByVal source As IEnumerable(Of T2), _
   ByVal keySelector As Func(Of T2,TKey), _
   ByVal resultSelector As Func(Of IEnumerable(Of T),T2,TResult) _
) As IEnumerable(Of TResult)

public IEnumerable<TResult> GroupJoin<T2,TResult>( 
   IEnumerable<T2> source,
   Func<T2,TKey> keySelector,
   Func<IEnumerable<T>,T2,TResult> resultSelector
)

Parameters

source: The second sequence to join to this collection.
keySelector: A function to extract from an item of the second sequence the value to match against this collection's key value.
resultSelector: A function to create a result element from an element of the second sequence and the collection of matching elements from this collection.

Type Parameters

T2: The type of the elements of the second sequence.
TResult: The type of the result elements.

Return Value

Enumeration of objects obtained by applying the result selector to group pairs, where each pair consists of an item of the second collection and the corresponding enumeration of the items of this collection joined to it.

Reference

Index<T,TKey> Class
Index<T,TKey> Members
Overload List