Debug

Object –> Debug

Prefer ILogger over System.Diagnostics.Debug and System.Diagnostics.Trace.
Methods and properties to debug code.
This class can only be used when the application is compiled in DEBUG mode.

enabling debugging

Either:

1. Add #define DEBUG (or #define TRACE) to the top of the file, or;
2. Add the /d:DEBUG or /d:TRACE flag when compiling.

adding trace listeners

Trace Listeners are shared by both Debug and Trace and used to output debug/trace information:

Using a TextWriterTraceListener

Debug.Listeners.Add(new TextWriterTraceListener(Console.Out));
Debug.AutoFlush = true;
Debug.WriteLine("message");

Using DefaultTraceListener

Trace.Listeners.Clear(); // Remove the default trace listener.
DefaultTraceListener defaultListener = new();
Trace.Listeners.Add(defaultListener); // This also automatically adds the listener to Debug.Listeners.
defaultListener.LogFileName = filename;

Debug.WriteLine("message");