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MemoryCache::Contains Method

Determines whether a cache entry exists in the cache.

Namespace:  System.Runtime.Caching
Assembly:  System.Runtime.Caching (in System.Runtime.Caching.dll)

public:
virtual bool Contains(
	String^ key, 
	String^ regionName
) override

Parameters

key
Type: System::String
A unique identifier for the cache entry to search for.
regionName
Type: System::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 nullptr by default, because the MemoryCache class does not implement regions.

Return Value

Type: System::Boolean
true if the cache contains a cache entry whose key matches key; otherwise, false.

ExceptionCondition
ArgumentNullException

key is nullptr.

NotSupportedException

regionName is not nullptr.

.NET Framework

Supported in: 4

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

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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