C#

public partial class Form1 : Form
{
    private Form debugForm;
    private TextBox debugTextBox;

    public Form1()
    {
        InitializeComponent();
    }

    void b_Click(object sender, EventArgs e)
    {
        // Remove panel from form.controls with button on panel is clicked
        Button b = (Button)sender;
        Panel p = (Panel)(b.Tag);
        this.Controls.Remove(p);
        debugTextBox.Text += "Click event fired for " + b.Name + " : this.Controls.Count = " +
            this.Controls.Count.ToString() + "\r\n";
    }

    private void Form1_FormClosing(object sender, FormClosingEventArgs e)
    {
        try
        {
            debugForm.Close();
        }
        catch { }
    }

    private void Form1_Load(object sender, EventArgs e)
    {
        for (int i = 0; i < 10; i++)
        {
            Panel p = new Panel();
            p.Left = 0;
            p.Top = i * 35;
            p.Width = 300;
            p.Height = 30;
            Button b = new Button();
            b.Left = 0;
            b.Top = 0;
            b.Width = 300;
            b.Height = 30;
            b.Name = b.Text = "Button" + i.ToString();
            b.Click += new EventHandler(b_Click);
            b.Tag = p;
            p.Controls.Add(b);
            this.Controls.Add(p);
        }

        Rectangle rScreen = System.Windows.Forms.Screen.PrimaryScreen.WorkingArea;
        this.Left = 0;
        this.Width = rScreen.Width / 2;
        this.Top = 0;
        this.Height = rScreen.Height;

        debugForm = new Form();
        debugForm.StartPosition = FormStartPosition.Manual;
        debugForm.Left = this.Right + 1;
        debugForm.Width = this.Width;
        debugForm.Top = this.Top;
        debugForm.Height = this.Height;
        debugTextBox = new TextBox();
        debugTextBox.Multiline = true;
        debugTextBox.Dock = DockStyle.Fill;
        debugTextBox.ScrollBars = ScrollBars.Both;
        debugForm.Controls.Add(debugTextBox);

        debugForm.Show();
    }
}