The SqlDependency defines a relationship between a Web application and an instance of SQL Server, allowing the detection of changes in the data at the server. The SqlDependency ensures that output cached pages are removed from the cache whenever the SQL table on which they depend changes.
The SqlCacheDependency class monitors the table so that when the table changes, the item will be automatically removed from the Cache. This class cannot be inherited.
Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)