ASP.NET 缓存：方法和最佳实践

摘要：ASP.NET 提供三种主要形式的缓存：页面级输出缓存、用户控件级输出缓存（或称为片段缓存）和缓存 API。输出缓存和片段缓存的优点是非常易于实现，在大多数情况下，使用这两种缓存就足够了。而缓存 API 则提供了额外的灵活性（实际上是相当大的灵活性），可用于在应用程序的每一层利用缓存。

详细阅读：http://www.microsoft.com/china/MSDN/library/WebServices/ASP.NET/ASP.NETCaching-TechniquesandBestPractiCEs.mspx?mfr=true

还有一篇是英文的，也讲解的可以：http://msdn2.microsoft.com/en-gb/library/ms972379.aspx

What is caching:
Caching is the process of storing frequently used data, usually data that is costly to generate, for reuse. Typically this data is stored in memory since retrieving data from memory is much more efficient than retrieving the data from other locations, such as a database.