CollectionsExtensions.ToFastKeyedCollection<TKey, TSource> Method

Creates a KeyedCollection<TKey, TItem> from an IEnumerable<T> 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.Generic.IEnumerable<TSource>
An IEnumerable<T> to create a KeyedCollection<TKey, TItem> from.
keySelector: Type: System.Func<TSource, 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: FastKeyedCollection<TKey, TSource>
A KeyedCollection<TKey, 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 IEnumerable<TSource>. 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