.Net Framework > v3.5.21022.8 > System > Linq > Enumerable > GroupBy<TSource,TKey,TElement,TResult> GroupBy<TSource,TKey,TElement,TResult>(IEnumerable<TSource>,Func<TSource,TKey>,Func<TSource,TElement>,Func<TKey,IEnumerable<TElement>,TResult>,IEqualityComparer<TKey>)

GroupBy<TSource,TKey,TElement,TResult>(IEnumerable<TSource>,Func<TSource,TKey>,Func<TSource,TElement>,Func<TKey,IEnumerable<TElement>,TResult>,IEqualityComparer<TKey>)

Category

Method

Description

Groups the elements of a sequence according to a specified key selector function and creates a result value from each group and its key. Key values are compared by using a specified comparer, and the elements of each group are projected by using a specified function.

Type

System.Collections.Generic.IEnumerable<TResult>

Character

public, static

Parameters

Name	Type	Description
source	System.Collections.Generic.IEnumerable<TSource>
keySelector	System.Func<TSource,TKey>
elementSelector	System.Func<TSource,TElement>
resultSelector	System.Func<TKey,System.Collections.Generic.IEnumerable<TElement>,TResult>
comparer	System.Collections.Generic.IEqualityComparer<TKey>

Attributes

Name	Value/Assignment
ExtensionAttribute

Tags

01892ABD01, 02E3ABA98D, 0322962271

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