What is Asynchronous

Asynchronous is the approach to release threads that are blocking on I/O calls back to the pool after the I/O request is finished. By using Asynchronous Javascript and XML(Ajax) you can retrieve new information from the web server without
having to download a whole new page. .Net provide multiple ways to handle Asynchronous calls,

• BeginExecuteNonQuery,
• EndExecuteNonQuery,
• BeginGetResponse,
• EndGetResponse

are the few methods in .net which are used for Asynchronous calls. When we are using these methods(Asynchronous), we could release the web request to the pool.