Routing with Web Forms - Could not load System.Web.Routing

Question

I am using:

• ASP.NET 3.5 SP1 with Web Forms
• Routing thru Global.asax (System.Web.Routing and RegisterRoutes)
• IIS 7

Everything is working fine in my local machine, but it gives the following error in my hosting environment:

Could not load file or assembly 'System.Web.Routing, Version=3.5.0.0, PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The system cannot find the file specified.

I did everything inside my web.config file mentioned in the following link:

http://msdn.microsoft.com/en-us/libr...8VS.90%29.aspx

But I am still getting the above error.

What else am I supposed to do fix the error?

Thank you for your help!

Answer 1

It could be possible that some settings in web.config are missing which are necessary when you host your application in IIS. Take a look at this article , especially Figure 2 which describes the configuration entries for IIS 7.

I remember that in ASP.NET 4 setting

<modules runAllManagedModulesForAllRequests="true" />

was enough and adding the modules and handlers in Figure 2 of this article wasn't required. But in ASP.NET 3.5 it might be necessary.