Lookup<TKey,TElement>.Item[TKey] Property
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Gets the collection of values indexed by the specified key.
public:
property System::Collections::Generic::IEnumerable<TElement> ^ default[TKey] { System::Collections::Generic::IEnumerable<TElement> ^ get(TKey key); };public System.Collections.Generic.IEnumerable<TElement> this[TKey key] { get; }member this.Item('Key) : seq<'Element>Default Public ReadOnly Property Item(key As TKey) As IEnumerable(Of TElement)- key
- TKey
The key of the desired collection of values.
The collection of values indexed by the specified key.
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'];
' Select a collection of Packages by indexing directly into the Lookup.
Dim cgroup As System.Collections.Generic.IEnumerable(Of String) = lookup("C"c)
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.
| Proizvod | Verzije |
|---|---|
| .NET | Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9, 10 |
| .NET Framework | 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1 |
| .NET Standard | 1.0, 1.1, 1.2, 1.3, 1.4, 1.6, 2.0, 2.1 |
| UWP | 10.0 |
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