Caching has long been recognized as one of the more effective ways to improve your ASP.NET web applications. However, one particular caching feature that was dearly missing in ASP.NET 1.x was SQL cache dependency. SQL cache dependency is the ability to invalidate a database cache if data in a table is changed. In ASP.NET 2.0, Microsoft has, much to the joy of developers, added the new SQL cache dependency feature. In this article, I will discuss SQL cache dependency in ASP.NET 2.0, as well as discuss how you can manually implement your own SQL cache dependency in ASP.NET 1.x.
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