Is there an explanation behind the error "The type or namespace name 'Script' does not exist in the namespace 'System.Web'"
asp.net, c#, deployment, iis-7
Solution
Looks like your provider does not have the dll `System.Web.Extensions` in the GAC.
The namespace `System.Web.Scripts` is part of the `System.Web.Extensions.dll`.
You can solve your problem if you do.
- Select `System.Web.Extensions` in your project References
- Go to properties tab and set `Copy Local` to `true`
This ensures that you deploy this dll too.
Problem
I made an "ASP.NET Empty Web Site" in Visual Studio Express 2010. On a code file in the App_Code, I have the line "using System.Web.Script.Serialization;" When I pushed the files to the server, I got the following error: Exception message: c:\inetpub[....]\Extensions.cs(10): error CS0234: The type or namespace name 'Script' does not exist in the namespace 'System.Web' (are you missing an assembly reference?) (The server is running Windows Server 2008 with IIS 7 with ASP.NET 4.0 installed.) Since this is a web site, and not a web project, I couldn't use the "publish" feature as promoted here: The type or namespace name 'Script' does not exist in the namespace 'System.Web' Finally, after some digging, I figured out that this namespace is included in the System.Web.Extension assembly, and that I had to manually include it via the web.config: ``` <compilation debug="true" targetFramework="4.0"> <assemblies> <add assembly="System.Web.Extensions, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" /> </assemblies> </compilation> ``` So, my question: is there a better way to go about this? Since none of this is needed on my local project, how can I first determine what assemblies I'll need to reference manually, and second, how can I get the information required to do the referencing (i.e., how do I get the PublicKeyToken)? UPDATE Because this is a Web Site and not a Web Project, my list of references does not show up until after I add them to the Web.Config manually. So, to select "Copy Local" to "true" does not work in this instance.