Trick for recompiling web api at development time

I am writing a Web API for after using in my mobile project via C#. I created an ASP.NET Web Application than at the creation pop up screen i chose Empty Template then chose Web API for "folders and core references".

Everything is ok for now. I setup the app in my local iis. I am writing my controllers and i can call it via browser or any other appropriate Http call but there is something which makes me crazy. I have to build the Application any time i change something.

Normally when developing web sites it is not necesssary to build for simple changes unlikely for Web Application projects, i know that.

But can i create my project in Web Site or is there a trick which recompiles every time a change happens in project.