ConcurrentDictionary<TKey,TValue>.IDictionary.Contains(Object) Method

Definition

Namespace:

System.Collections.Concurrent

Assembly:

System.Collections.Concurrent.dll

Source:

ConcurrentDictionary.cs

Gets a value that indicates the IDictionary<TKey,TValue> contains an element with the specified key.

 virtual bool System.Collections.IDictionary.Contains(System::Object ^ key) = System::Collections::IDictionary::Contains;

bool IDictionary.Contains (object key);

abstract member System.Collections.IDictionary.Contains : obj -> bool
override this.System.Collections.IDictionary.Contains : obj -> bool

Function Contains (key As Object) As Boolean Implements IDictionary.Contains

Parameters

key

Object

The key to locate in the IDictionary<TKey,TValue>.

Returns

Boolean

true if the IDictionary<TKey,TValue> contains an element with the specified key; otherwise, false.

Implements

Contains(Object)

Exceptions

ArgumentNullException

key is null.

See also

• Thread-Safe Collections
• How to: Add and Remove Items from a ConcurrentDictionary