I have put some Console.WriteLine calls in to test, but they aren't appearing in the output box?

public static ArrayList myDeliveries = new ArrayList();
    public mainForm()
    {
        InitializeComponent();
    }

   private void mainForm_Load(object sender, EventArgs e)
    {
        if (!File.Exists("../../MealDeliveries.txt"))
        {
            MessageBox.Show("File not found!");
            return;
        }

        using (StreamReader sr = new StreamReader("../../MealDeliveries.txt"))
        {
            //first line is delivery name 
            string strDeliveryName = sr.ReadLine();
            Console.WriteLine("some tetttttttttt23423423423423423ttttttttttttttttttttttt");
            while (strDeliveryName != null)
            {
                //other lines 
                Delivery d = new Delivery(strDeliveryName, sr.ReadLine(),
                                          sr.ReadLine(), sr.ReadLine(),
                                          sr.ReadLine(), sr.ReadLine(),
                                          sr.ReadLine());
                mainForm.myDeliveries.Add(d);

                //check for further values
                strDeliveryName = sr.ReadLine();
            }
        }
        displayDeliveries();


    }


    private void displayDeliveries()
    {
        lstDeliveryDetails.Items.Clear();
        Console.WriteLine("some tettttttttttttttttttttttttttttttttt");
        Console.WriteLine(mainForm.myDeliveries.Count);
        foreach (Delivery d in mainForm.myDeliveries)
        {
            lstDeliveryDetails.Items.Add(d.DeliveryName);

        }
    }

Can anyone help??