Csharp/C Sharp by API/System.Diagnostics/DefaultTraceListener

new DefaultTraceListener()

  
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Text;

public class MainClass
{
    public static void Main()
    {
        DefaultTraceListener dtl = new DefaultTraceListener();
        dtl.AssertUiEnabled = true;
        Trace.Listeners.Add(dtl);
    }
}