MemoryCache.Contains(String, String) Method

Definition

Namespace:

System.Runtime.Caching

Assembly:

System.Runtime.Caching.dll

Package:

System.Runtime.Caching v9.0.0-rc.2.24473.5

Source:

MemoryCache.cs

Determines whether a cache entry exists in the cache.

public override bool Contains (string key, string regionName = default);

override this.Contains : string * string -> bool

Public Overrides Function Contains (key As String, Optional regionName As String = Nothing) As Boolean

Parameters

key

String

A unique identifier for the cache entry to search for.

regionName

String

A named region in the cache to which a cache entry was added. Do not pass a value for this parameter. This parameter is null by default, because the MemoryCache class does not implement regions.

Returns

Boolean

true if the cache contains a cache entry whose key matches key; otherwise, false.

Exceptions

ArgumentNullException

key is null.

NotSupportedException

regionName is not null.