exception handling for servicemodel exceptions
try{  call to service }
  catch(CommunicationObjectFaultedException){}
   catch (EndpointNotFoundException){}

public static bool TryExecute(Action a) {
        try {
            a();
            return true;
        }
        catch (CommunicationObjectFaultedException) { }
        catch (EndpointNotFoundException) { }
        return false;
    }

bool ok = TryExecute(() => {
            // call to service
            //...
        });