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Lookup(Of TKey, TElement).Item Property

Gets the collection of values indexed by the specified key.

Namespace:  System.Linq
Assemblies:   System.Core (in System.Core.dll)
  System.Linq (in System.Linq.dll)

'Declaration
Public ReadOnly Property Item ( _
	key As TKey _
) As IEnumerable(Of TElement)

Parameters

key
Type: TKey

The key of the desired collection of values.

Property Value

Type: System.Collections.Generic.IEnumerable(Of TElement)
The collection of values indexed by the specified key.

Implements

ILookup(Of TKey, TElement).Item

This indexed property provides the ability to index a specific collection of values in the Lookup(Of TKey, TElement) by using the following syntax: myLookup[key] in Visual C# or myLookup(key) in Visual Basic. If the key is not found in the collection, an empty sequence is returned.

The following example demonstrates how to use Item to index directly into a Lookup(Of TKey, TElement). This code example is part of a larger example provided for the Lookup(Of TKey, TElement) class.

' Select a collection of Packages by indexing directly into the Lookup. 
Dim cgroup As System.Collections.Generic.IEnumerable(Of String) = lookup("C"c)

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

XNA Framework

Supported in: 3.0

Portable Class Library

Supported in: Portable Class Library

Supported in: Windows Phone 8.1

Supported in: Windows Phone Silverlight 8.1

Supported in: Windows Phone Silverlight 8
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