host.Start()启动后的host对象和从容器获取的IWorkflowHost对象不一样

[zengxiansheng]

Describe the bug host.Start()启动后的host对象和从容器获取的IWorkflowHost对象不一样，从容器获取的IWorkflowHost对象无法启动工作流，提示工作流未注册。

` //启动代码片段 var host = provider.GetService<IWorkflowHost>(); host.RegisterWorkflow<TestWorkflow, MyDataClass>(); host.Start();

  CommonUtitl.workflowHost = host;  //保存对象全局使用

`

string id = "TestWorkflow"; int version = 1; string workflowId = null; var def = _registry.GetDefinition(id, version); //结果：null var def2 = CommonUtitl.workflowHost.Registry.GetDefinition(id, version); //结果：有值 var tt = CommonUtitl.workflowHost == _workflowHost; //结果：不相等

To Reproduce

Expected behavior 从容器获取的IWorkflowHost对象和host.Start();后一样

Additional context Add any other context about the problem here.

[payphonepf]

You should not holding a singleton lifetime reference at CommonUtil, this violate the idea of IoC. The lifetime behavior should specified during class registry time.