System.ServiceProcess.TimeoutException: Time out has expired and the operation has not been completed.

项目代码如下

ServiceController service = new ServiceController("ModbusAgent");
service.Stop();
TimeSpan timeout = new TimeSpan();
service.WaitForStatus(ServiceControllerStatus.Stopped, timeout); 

按照Stackoverflow:Time out has expired and the operation has not been completed in Service manager的说法,不要对其设置服务超时

于是代码改成:

ServiceController service = new ServiceController("ModbusAgent");
service.Stop();
service.WaitForStatus(ServiceControllerStatus.Stopped); 

问题解决