Turn on IncludeExceptionDetailInFaults (either from ServiceBehaviorAttribute or from the configuration behavior) on the server

Question

I have a WCF service that has been working perfectly, and something has changed and I don\'t know what.

I get this exception:

System.ServiceMo

Answer 1

You can also set it in the [ServiceBehavior] tag above your class declaration that inherits the interface

[ServiceBehavior(IncludeExceptionDetailInFaults = true)]
public class MyClass:IMyService
{
...
}

Immortal Blue is correct in not disclosing the exeption details to a publicly released version, but for testing purposes this is a handy tool. Always turn back off when releasing.