MemoryCache.Contains(String, String) Method
Definition
Important
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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
true
if the cache contains a cache entry whose key matches key
; otherwise, false
.
Exceptions
key
is null
.
regionName
is not null
.
Applies to
.NET
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