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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>.

Implements

ILookup<TKey, TElement>.Count

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;


.NET Framework

Supported in: 4, 3.5

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Portable Class Library

Supported in: Portable Class Library

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

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

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