What is Output Caching in MVC? How to implement it?

Output caching in MVC is a performance optimization technique that stores the HTML output of a controller action so that subsequent requests for the same action can be served faster without re-executing the action. It helps reduce server load and improves the response time for frequently accessed pages. 

To implement output caching in MVC, you can use the [OutputCache] attribute on your controller actions or configure it in the web.config file:

Output caching in MVC is a technique used to improve the performance of web applications by storing the output of an action method in cache.

Outputcache is one of the type of ResultFilter only

//Using the [OutputCache] attribute:

[OutputCache(Duration = 3600)] // Cache the output for 1 hour

public ActionResult CachedAction()
{
    // Action logic
}
 
//Configuring output caching in web.config:
 
<system.web>
    <caching>
        <outputCacheSettings>
            <outputCacheProfiles>
                <add name="CacheProfileName" duration="3600" varyByParam="none" />
            </outputCacheProfiles>
        </outputCacheSettings>
    </caching>
</system.web>

//Then, apply the cache profile to your action:

[OutputCache(CacheProfile = "CacheProfileName")]
public ActionResult CachedAction()
{
    // Action logic
}