最好的选择是使用“系统”。诊断的名称空间。

将代码包含在if else块中，用于调试模式和发布模式，如下所示，在visual studio中切换调试和发布模式。

#if DEBUG  // for debug mode
       **Debugger.Launch();**  //debugger will hit here
       foreach (var job in JobFactory.GetJobs())
            {
                //do something 
            }

#else    // for release mode
      **Debugger.Launch();**  //debugger will hit here
     // write code here to do something in Release mode.

#endif

static void Main()
{
#if DEBUG
                // Run as interactive exe in debug mode to allow easy
                // debugging.

                var service = new MyService();
                service.OnStart(null);

                // Sleep the main thread indefinitely while the service code
                // runs in .OnStart

                Thread.Sleep(Timeout.Infinite);
#else
                // Run normally as service in release mode.

                ServiceBase[] ServicesToRun;
                ServicesToRun = new ServiceBase[]{ new MyService() };
                ServiceBase.Run(ServicesToRun);
#endif
}

我认为这取决于你使用的操作系统，Vista很难附加到服务，因为会话之间的分离。

我过去使用的两个选项是:

Use GFlags (in the Debugging Tools for Windows) to setup a permanent debugger for a process. This exists in the "Image File Execution Options" registry key and is incredibly useful. I think you'll need to tweak the Service settings to enable "Interact with Desktop". I use this for all types of debugging, not just services. The other option, is to separate the code a bit, so that the service part is interchangable with a normal app startup. That way, you can use a simple command line flag, and launch as a process (rather than a Service), which makes it much easier to debug.

希望这能有所帮助。

对于现有Windows服务程序的故障排除，请像其他人建议的那样使用'Debugger.Break()'。

对于新的Windows服务程序，我建议使用James Michael Hare的方法http://geekswithblogs.net/BlackRabbitCoder/archive/2011/03/01/c-toolbox-debug-able-self-installable-windows-service-template-redux.aspx

第一行的Debugger.Break()怎么样?

使用Windows Service Template c#项目创建一个新的服务应用程序https://github.com/HarpyWar/windows-service-template

有控制台/服务模式自动检测，自动安装/卸载您的服务，包括几个最常用的功能。