Visual Studio has added the full set of dependencies for ASP.NET Web API 2 to project 'TypeScriptTest'. The Global.asax.cs file in the project may require additional changes to enable ASP.NET Web API. 1. Add the following namespace references: using System.Web.Http; using System.Web.Routing; 2. If the code does not already define an Application_Start method, add the following method: protected void Application_Start() { } 3. Add the following lines to the beginning of the Application_Start method: GlobalConfiguration.Configure(WebApiConfig.Register);