Caching stores frequently accessed data in memory to improve the performance of web applications. There are several types of caching in ASP.NET including output caching, data caching, object caching, and class caching. Output caching caches entire page output while data caching caches data source controls. Object caching provides flexibility to cache any object type using a key name. Caching avoids processing overhead by retrieving cached data from memory instead of generating it for each request.

1. By Shivam Lohiya

2.  Caching Provides a way of storing frequently
accessed data and reusing that data.
 Improve performance of web application.
 It could be directly retrieved from the
memory instead of being generated by the
application.

3.  Output Caching
 Data Caching
 Object Caching
 Class Caching
 Configuration Caching

4.  Rendering a page may involve some complex
processes such as, database access,
rendering complex controls etc.
 The OutputCache directive is responsible of
output caching.
 The OutputCache directive has the following
attribute.
◦ Dishcacheable
◦ No store
◦ Cache profile
◦ Varbyparam
◦ Location
OutputCache Duration="15"
VaryByParam="None

5.  The main aspect of data caching is caching
the data source controls.
 These controls derive from the abstract class
DataSourceControl and have the following
inherited properties for implementing
caching
◦ CacheDuration
◦ CacheExpirationPolicy
◦ CacheKeyDependency
◦ EnableCaching
EnableCaching = "true"
CacheDuration = "60">

6.  Object caching provides more flexibility than
other cache techniques.
 You can use object caching to place any
object in the cache. The object can be of any
type - a data type, a web control, a class, a
dataset object, etc.
 The item is added to the cache simply by
assigning a new key name.
 ASP.NET also provides the Insert() method for
inserting an object to the cache. This method
has four overloaded versions.
Cache["key"] = item;

7.  Tutorials point
 Yogesh sharma - Youtube.com
Thank You