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Dictionary<TKey, TValue>::ICollection<KeyValuePair<TKey, TValue>>::Contains Method

Determines whether the ICollection<T> contains a specific key and value.

Namespace:  System.Collections.Generic
Assembly:  mscorlib (in mscorlib.dll)

private:
virtual bool Contains(
	KeyValuePair<TKey, TValue> keyValuePair
) sealed = ICollection<KeyValuePair<TKey, TValue>>::Contains

Parameters

keyValuePair
Type: System.Collections.Generic::KeyValuePair<TKey, TValue>

The KeyValuePair<TKey, TValue> structure to locate in the ICollection<T>.

Return Value

Type: System::Boolean
true if keyValuePair is found in the ICollection<T>; otherwise, false.

Implements

ICollection<T>::Contains(T)

This method determines equality using the default equality comparer EqualityComparer<T>::Default for the System.Collections.Generic::KeyValuePair<TKey, TValue> structure.

This method approaches an O(1) operation.

The following example shows how to use the ICollection<KeyValuePair<TKey, TValue>>::Add, ICollection<KeyValuePair<TKey, TValue>>::Contains, ICollection<KeyValuePair<TKey, TValue>>::CopyTo, and ICollection<KeyValuePair<TKey, TValue>>::Remove methods of the System.Collections.Generic::ICollection<T> generic interface to manipulate a Dictionary<TKey, TValue> object.

No code example is currently available or this language may not be supported.

.NET Framework

Supported in: 4.5.2, 4.5.1, 4.5, 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Portable Class Library

Supported in: Portable Class Library

.NET for Windows Store apps

Supported in: Windows 8

.NET for Windows Phone apps

Supported in: Windows Phone 8.1, Windows Phone 8, Silverlight 8.1

Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, 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.

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