CollectionsExtensionsToFastKeyedCollectionTKey, TSource Method

Creates a KeyedCollectionTKey, TItem from an IEnumerableT according to a specified key selector function.

Namespace: Cauldron
Assembly: Cauldron.Collections (in Cauldron.Collections.dll) Version: 1.0.0

Syntax

public static FastKeyedCollection<TKey, TSource> ToFastKeyedCollection<TKey, TSource>(
	this IEnumerable<TSource> source,
	Func<TSource, TKey> keySelector
)
where TSource : class

<ExtensionAttribute>
Public Shared Function ToFastKeyedCollection(Of TKey, TSource As Class) ( 
	source As IEnumerable(Of TSource),
	keySelector As Func(Of TSource, TKey)
) As FastKeyedCollection(Of TKey, TSource)

public:
[ExtensionAttribute]
generic<typename TKey, typename TSource>
where TSource : ref class
static FastKeyedCollection<TKey, TSource>^ ToFastKeyedCollection(
	IEnumerable<TSource>^ source, 
	Func<TSource, TKey>^ keySelector
)

Parameters

source: Type: System.Collections.GenericIEnumerableTSource
An IEnumerableT to create a KeyedCollectionTKey, TItem from.
keySelector: Type: SystemFuncTSource, TKey
A function to extract a key from each element.

Type Parameters

TKey: The type of the key returned by keySelector.
TSource: The type of the elements of source.

Return Value

Type: FastKeyedCollectionTKey, TSource
A KeyedCollectionTKey, TItem that contains values of source.

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type IEnumerableTSource. When you use instance method syntax to call this method, omit the first parameter. For more information, see Extension Methods (Visual Basic) or Extension Methods (C# Programming Guide).

Reference

CollectionsExtensions Class