Gets a per-object cache, accessed as an IDictionary of key/value pairs.
Assembly: System (in System.dll)
A TypeDescriptor may need to perform complex operations on collections of metadata. Because types are not unloaded for the life of a domain, the TypeDescriptor class will automatically cache the results of these operations based on type. However, some operations use live object instances. These operations cannot be cached within the TypeDescriptor class because caching them would prevent the object from being garbage collected. Instead, the TypeDescriptor class allows for a per-object cache, accessed as an IDictionary of key/value pairs, to exist on an object. The method returns an instance of this cache. The method will return null if there is no supported cache for an object.
The default TypeDescriptionProvider used by TypeDescriptor examines the object to see if it is a sited component that implements the IDictionaryService interface. If the object is, it uses the dictionary service to store the object's cache. Otherwise, the object it returns null. Other type description providers may provide their own implementation here. For example, dependency objects can just attach a property of type IDictionary.
Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, 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.