In testing our app on a windows 8 x64 server, we ran into an issue that when adding an XmlWriterTraceListner to the app config file, the service is throwing a class not found exception.
Service cannot be started. System.Configuration.ConfigurationErrorsException: Couldn't find type for class System.Diagnostics.XmlWriterTraceListener, System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089.
It's my understanding that Windows 8 should already have .net 4.0 installed? Why is it missing this class? Any official workaround for this problem?