Http Handlers in asp.net
-ASP.NET HTTP handler is the process (frequently referred to as the "endpoint")
that runs in response to a request made to an ASP.NET Web application.
An HTTP handler can be either synchronous or asynchronous.
A synchronous handler does not return until it finishes processing the HTTP request for
which it is called.
An asynchronous handler runs a process independently of sending a response to the user
Uses of Http Handlers
Http Handlers provide us functionality to create user friendly (easy to remember) Urls.