FileLoadException was unhandled by user code

Question

I am setting up the API for my MVC-4 app and when I uncommented this line in Globals.asax.cs:

WebApiConfig.Register(GlobalConfiguration.Configuration);
         


        

Answer 1

Most probably Newtonsoft.Json DLL is not properly deployed.

Make sure you have the Newtonsoft.Json DLL in your (IIS / project) bin folder.
Alternatively, you can also install that DLL to GAC if you plan to use it across multiple projects.