Count Property
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Lookup<TKey, TElement>.Count Property

 

Gets the number of key/value collection pairs in the Lookup<TKey, TElement>.

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

public int Count { get; }

Property Value

Type: System.Int32

The number of key/value collection pairs in the Lookup<TKey, TElement>.

The value of the Count property does not change because items cannot be added to or removed from a Lookup<TKey, TElement> object after it has been created.

The following example demonstrates how to use Count to determine the number of key/value collection pairs in a Lookup<TKey, TElement>. This code example is part of a larger example provided for the Lookup<TKey, TElement> class.

// Get the number of key-collection pairs in the Lookup.
int count = lookup.Count;

Universal Windows Platform
Available since 8
.NET Framework
Available since 3.5
Portable Class Library
Supported in: portable .NET platforms
Silverlight
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1
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