Output Caching to Enhance Web Site Performance in .NET

To achieve better performance with ASP.NET one way to use output caching to reduce server workload. This is an optimization that reduces Web server response time.
Setting application-level caching enables you to change cache behavior from a single configuration file rather than editing the @ OutputCache directive of individual pages.

Add the following XML as a child of the system.web element:

<!-- caching section group --> <caching><outputCacheSettings><outputCacheProfiles><add name="WebAppCache1" enabled="true" duration="60"/> </outputCacheProfiles></outputCacheSettings></caching>

Change the @ OutputCache directive to read as follows:

<%@ OutputCache CacheProfile="WebAppCache1" VaryByParam="none" %>