How do you know the WEB API version of your project?

I am using Asp.Net MVC 4.0 Project Template then what is the web api version i will be using in my projects. I don't know how to find the web api version using in my project. How to get this version of web api?

By default a MVC 4.0 template ships with version 4.0.20710.0 of WebAPI (aka Web API 1). To check this, open your solution, expand the WebAPI solution, then open the packages.config file that holds the NuGet config for what you have installed. If you have not updated the packages you should see this.

<package id="Microsoft.AspNet.WebApi" version="4.0.20710.0" targetFramework="net40" />

You can now go to the NuGet website and examine the package history here. I have copied the contents of this page below. As you can see this version of WebAPI was released on 11th Aug 2012. This version was better known as "WebAPI 1" after WebAPI 2 was released around Jan 2014. You can upgrade your MVC4 project to use WebAPI 2 if you wish by using the NuGet update wizard.

Version History