System.Web.Optimization and Microsoft.Web.Optimization won't load reference in vs 2012

Question

I\'m working on an MVC 4 project started in Visual Studio 2010. Right now I\'m working on a machine with Visual Studio 2012 as I don\'t have access to the machine I was original

Answer 1

I know there are many answers to this issue, but give this a try- open the project in visual studio as an Administrator.It did solve in my case.

Answer 2

I fixed this issue by setting the reference to the assembly System.Web.Optimization.dll to copy local to true.

Answer 3

Simple Solution. Open Visual Studio in administrator mode. It will resolve your error.

Answer 4

I had the same problem with a VS2010 project I opened in VS2012. The Microsoft.AspNet.Web.Optimization package was missing so I just needed to download it using Nuget Package Manager.

You can run in the console: Install-Package Microsoft.AspNet.Web.Optimization

Answer 5

Uninstalling, and reinstalling the Microsoft.AspNet.Web.Optimization package solved it for me.

Answer 6

Try going to the web.config in the Views folder and removing the following line:

        <add namespace="System.Web.Optimization" />

That fixed it for me.