Lookup<TKey, TElement>.Item Property

public IEnumerable<TElement> this[
	TKey key
] { get; }

Implements

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 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<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.
IEnumerable<string> cgroup = lookup['C'];

.NET Framework

.NET Framework Client Profile

Portable Class Library

.NET for Windows Store apps

Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

Reference