Lookup<TKey, TElement>.Item Property
Microsoft Silverlight will reach end of support after October 2021. Learn more.
Gets the collection of values indexed by the specified key.
Namespace: System.Linq
Assembly: System.Core (in System.Core.dll)
Syntax
'Declaration
Public ReadOnly Property Item ( _
key As TKey _
) As IEnumerable(Of TElement)
public IEnumerable<TElement> this[
TKey key
] { get; }
Parameters
- key
Type: TKey
The key of the desired collection of values.
Property Value
Type: System.Collections.Generic.IEnumerable<TElement>
The collection of values indexed by the specified key.
Implements
Remarks
This indexed property provides the ability to index a specific collection of values in the Lookup<TKey, TElement> by using the following syntax: myLookup[key] in Visual C# or myLookup(key) in Visual Basic. If key is not found in the collection, an empty sequence is returned.
Examples
The following example demonstrates how to use Item to index directly into a Lookup<TKey, TElement>. This code example is part of a larger example provided for the Lookup<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)
// Select a collection of Packages by indexing directly into the Lookup.
IEnumerable<string> cgroup = lookup['C'];
Version Information
Silverlight
Supported in: 5, 4, 3
Silverlight for Windows Phone
Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0
XNA Framework
Supported in: Xbox 360, Windows Phone OS 7.0
Platforms
For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.