The type or namespace name "ScriptBundle" could not be found (did you specify a usage directive or assembly reference?)

Question

using System.Web; using System.Web.Optimization; bundles.Add(new ScriptBundle("~/bundles/jquery").Include( "~/Scripts/jquery-{version}.js")); bundles.Add(new ScriptBundle("~/bundles/jqueryui").Include( "~/Scripts/jquery-ui-{version}.js")); bundles.Add(new ScriptBundle("~/bundles/jqueryval").Include( "~/Scripts/jquery.unobtrusive*", "~/Scripts/jquery.validate*")); 

I get an error message:

 Error 16 The type or namespace name 'ScriptBundle' could not be found (are you missing a using directive or an assembly reference?) 

Looks like some kind of reference problem, but I can't understand it. Please help. What can cause this error?

Answer 1

 Install-Package Microsoft.AspNet.Web.Optimization 

Answer 2

I got this error when I upgraded the MVC3 project to MVC4. I missed the links to System.Web.Optimization.dll, which is in the NuGet package. Microsoft ASP.NET Web Optimization Framework (Microsoft.AspNet.Web.Optimization).

Answer 3

I had the same problem. here is the solution
How to add a link to System.Web.Optimization for MVC-3 application with conversion to application .