public void TestCleanup()
 {
     try
     {
         WebServiceProxy.GeoReferenceService.Logout(_clientInformation);
         _clientInformation = null;
         WebServiceProxy.CloseClients();
     }
     catch
     {
         // Test is done.
         // We are not interested in problems that
         // occures due to test of error handling.
     }
 }