MemoryCache.Contains(String, String) Method
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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
- 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.
true
if the cache contains a cache entry whose key matches key
; otherwise, false
.
key
is null
.
regionName
is not null
.
Product | Versions |
---|---|
.NET | 8 (package-provided), 9 (package-provided) |
.NET Framework | 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7 (package-provided), 4.7, 4.7.1 (package-provided), 4.7.1, 4.7.2 (package-provided), 4.7.2, 4.8 (package-provided), 4.8, 4.8.1 |
.NET Standard | 2.0 (package-provided) |
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