Issue in Global.asax.cs page in MVC4

I my ASP.NET MVC 4 Project, my `Global.asax.cs` page shows the error on ``` WebApiConfig.Register(GlobalConfiguration.Configuration); ``` The name 'GlobalConfiguration' does not exist in the current context I have done many controllers and Views and all... How can I solve this issue and recover my project? Here is the rest of my code for context ``` using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.Http; using System.Web.Mvc; using System.Web.Routing; namespace ..... { // Note: For instructions on enabling IIS6 or IIS7 classic mode, // visit http://go.microsoft.com/?LinkId=9394801 public class MvcApplication : System.Web.HttpApplication { protected void Application_Start() { AreaRegistration.RegisterAllAreas(); WebApiConfig.Register(GlobalConfiguration.Configuration); FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters); RouteConfig.RegisterRoutes(RouteTable.Routes); } } } ```