IIS循环事件后的.NET类型初始化异常

Using .NET 3.5 C#, I have a WCF web service serving mobile clients. The clients frequently use the service to send data to the server and receive updates. The service in deployed in IIS 7.5 and is configured to recycle every morning at 0600 hrs. The recycle usually works seemlessly and the clients continue to use the service as usual. However there has been a couple of incidents where the recycle results in the application getting into a funny state and I can see the log full of type initialisation errors as below. It is almost like something happens during the overlapped recyling where it has not successfully unloaded the DLLs:Using .NET 3.5 C#, I have a WCF web service ser