Console.WriteLine() inside a Windows Service?

The output will simply be discarded.

In a Windows Service there is no Console so Console.Write* output is
discarded. There are a number of alternatives:

1. The System.Diagnostics.Trace class has a similar interface to the
   Console class so you could migrate your code quite easily to this.
2. It can then be configured to output to a file. You can use the
   System.Diagnostics.EventLog class to write to the Event Log which you can then monitor using Event Viewer.
3. You can use the third-party
   open-source log4net library which is very flexible.