Given that ServiceBase.OnStart has protected visibility, I went down the reflection route to achieve the debugging.
private static void Main(string[] args)
{
var serviceBases = new ServiceBase[] {new Service() /* ... */ };
#if DEBUG
if (Environment.UserInteractive)
{
const BindingFlags bindingFlags =
BindingFlags.Instance | BindingFlags.NonPublic;
foreach (var serviceBase in serviceBases)
{
var serviceType = serviceBase.GetType();
var methodInfo = serviceType.GetMethod("OnStart", bindingFlags);
new Thread(service => methodInfo.Invoke(service, new object[] {args})).Start(serviceBase);
}
return;
}
#endif
ServiceBase.Run(serviceBases);
}
Note that Thread is, by default, a foreground thread. returning from Main while the faux-service threads are running won't terminate the process.