protected void SetUp()
 {
     _svcContainer = new ServiceContainer();
     _extMgr       = new ExtensionManager(_svcContainer);
     _extMgr.ReflectionOnlyScan(new ActivePartRegStrategy(_svcContainer), typeof(TestActivePart).Assembly.FullName);
     _svcContainer.Publish <IActivePartManager>(sp => new ActivePartManager(_svcContainer));
 }