Enumerable.GroupBy Method (System.Linq)

MSDN Library
.NET Development
.NET Framework 3.5
.NET Framework Class Library
System.Linq Namespace
Enumerable Class
Enumerable Methods

GroupBy Method

GroupBy(TSource, TKey) Method (IEnumerable(TSource), Func(TSource, TKey))
GroupBy(TSource, TKey) Method (IEnumerable(TSource), Func(TSource, TKey), IEqualityComparer(TKey))
GroupBy(TSource, TKey, TElement) Method (IEnumerable(TSource), Func(TSource, TKey), Func(TSource, TElement))
GroupBy(TSource, TKey, TResult) Method (IEnumerable(TSource), Func(TSource, TKey), Func(TKey, IEnumerable(TSource), TResult))
GroupBy(TSource, TKey, TElement) Method (IEnumerable(TSource), Func(TSource, TKey), Func(TSource, TElement), IEqualityComparer(TKey))
GroupBy(TSource, TKey, TElement, TResult) Method (IEnumerable(TSource), Func(TSource, TKey), Func(TSource, TElement), Func(TKey, IEnumerable(TElement), TResult))
GroupBy(TSource, TKey, TResult) Method (IEnumerable(TSource), Func(TSource, TKey), Func(TKey, IEnumerable(TSource), TResult), IEqualityComparer(TKey))
GroupBy(TSource, TKey, TElement, TResult) Method (IEnumerable(TSource), Func(TSource, TKey), Func(TSource, TElement), Func(TKey, IEnumerable(TElement), TResult), IEqualityComparer(TKey))

Related Links

Aggregate Method
All(TSource) Method
Any Method
AsEnumerable(TSource) Method
Average Method
Cast(TResult) Method
Concat(TSource) Method
Contains Method
Count Method
DefaultIfEmpty Method
Distinct Method
ElementAt(TSource) Method
ElementAtOrDefault(TSource) Method
Empty(TResult) Method
Except Method
First Method
FirstOrDefault Method
GroupJoin Method
Intersect Method
Join Method
Last Method
LastOrDefault Method
LongCount Method
Max Method
Min Method
OfType(TResult) Method
OrderBy Method
OrderByDescending Method
Range Method
Repeat(TResult) Method
Reverse(TSource) Method
Select Method
SelectMany Method
SequenceEqual Method
Single Method
SingleOrDefault Method
Skip(TSource) Method
SkipWhile Method
Sum Method
Take(TSource) Method
TakeWhile Method
ThenBy Method
ThenByDescending Method
ToArray(TSource) Method
ToDictionary Method
ToList(TSource) Method
ToLookup Method
Union Method
Where Method

Enumerable..::.GroupBy Method
This page is specific to:.NET Framework Version:3.5Silverlight 3

.NET Framework Class Library

Enumerable..::.GroupBy Method

Groups the elements of a sequence.

Overload List

	Name	Description
	GroupBy<(Of <(TSource, TKey>)>)(IEnumerable<(Of <(TSource>)>), Func<(Of <(TSource, TKey>)>))	Groups the elements of a sequence according to a specified key selector function.
	GroupBy<(Of <(TSource, TKey>)>)(IEnumerable<(Of <(TSource>)>), Func<(Of <(TSource, TKey>)>), IEqualityComparer<(Of <(TKey>)>))	Groups the elements of a sequence according to a specified key selector function and compares the keys by using a specified comparer.
	GroupBy<(Of <(TSource, TKey, TElement>)>)(IEnumerable<(Of <(TSource>)>), Func<(Of <(TSource, TKey>)>), Func<(Of <(TSource, TElement>)>))	Groups the elements of a sequence according to a specified key selector function and projects the elements for each group by using a specified function.
	GroupBy<(Of <(TSource, TKey, TResult>)>)(IEnumerable<(Of <(TSource>)>), Func<(Of <(TSource, TKey>)>), Func<(Of <(TKey, IEnumerable<(Of <(TSource>)>), TResult>)>))	Groups the elements of a sequence according to a specified key selector function and creates a result value from each group and its key.
	GroupBy<(Of <(TSource, TKey, TElement>)>)(IEnumerable<(Of <(TSource>)>), Func<(Of <(TSource, TKey>)>), Func<(Of <(TSource, TElement>)>), IEqualityComparer<(Of <(TKey>)>))	Groups the elements of a sequence according to a key selector function. The keys are compared by using a comparer and each group's elements are projected by using a specified function.
	GroupBy<(Of <(TSource, TKey, TElement, TResult>)>)(IEnumerable<(Of <(TSource>)>), Func<(Of <(TSource, TKey>)>), Func<(Of <(TSource, TElement>)>), Func<(Of <(TKey, IEnumerable<(Of <(TElement>)>), TResult>)>))	Groups the elements of a sequence according to a specified key selector function and creates a result value from each group and its key. The elements of each group are projected by using a specified function.
	GroupBy<(Of <(TSource, TKey, TResult>)>)(IEnumerable<(Of <(TSource>)>), Func<(Of <(TSource, TKey>)>), Func<(Of <(TKey, IEnumerable<(Of <(TSource>)>), TResult>)>), IEqualityComparer<(Of <(TKey>)>))	Groups the elements of a sequence according to a specified key selector function and creates a result value from each group and its key. The keys are compared by using a specified comparer.
	GroupBy<(Of <(TSource, TKey, TElement, TResult>)>)(IEnumerable<(Of <(TSource>)>), Func<(Of <(TSource, TKey>)>), Func<(Of <(TSource, TElement>)>), Func<(Of <(TKey, IEnumerable<(Of <(TElement>)>), TResult>)>), IEqualityComparer<(Of <(TKey>)>))	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.

See Also

Reference

Enumerable Class

Enumerable Members

System.Linq Namespace

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