If you install Azure SDK 1.4 and then your web roles say System.TypeLoadException for System.ServiceModel.Activation.HttpModule in ASP.NET 4

If you install Azure SDK 1.4 and then your web roles say System.TypeLoadException for System.ServiceModel.Activation.HttpModule in ASP.NET 4, then follow this advice

http://blogs.iis.net/webtopics/archive/2010/04/28/system-typeloadexception-for-system-servicemodel-activation-httpmodule-in-asp-net-4.aspx

and run:

aspnet_regiis -iru

in a "run as admin" command prompt