System.Web.Optimization cannot find a reference

In the development of MVC4, if the created project is an empty MVC project, there is no content for the BundleConfig.cs item in the App_start directory, which is not found in the entire library when manually added: System.Web.Optimization namespace.

So how to find the System.Web.Optimization namespace and finish adding BundleConfig.cs content.

Here's how: Open the Package management console, if it's multiple projects, notice whether the default project is the current project

In the console, enter: Install-package Microsoft.AspNet.Web.Optimization press ENTER.

In the console, if you see the prompt: "Microsoft.AspNet.Web.Optimization 1.1.3" was successfully added to * * * *.

At this point in your project you have added the Microsoft.AspNet.Web.Optimization.dll application, you can find the "System.Web.Optimization" namespace, Use the Bundlecollection object at the same time.

System.Web.Optimization cannot find a reference