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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
Assemblies:   System.Core (in System.Core.dll)
  System.Linq (in System.Linq.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: 4.6, 4.5, 4, 3.5

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

XNA Framework

Supported in: 3.0

Portable Class Library

Supported in: Portable Class Library

Supported in: Windows Phone 8.1

Supported in: Windows Phone Silverlight 8.1

Supported in: Windows Phone Silverlight 8
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