Get all controls on a form window

  using System;  
  using System.Drawing;
  using System.Windows.Forms;

    class MyForm : Form
  {
    private TextBox firstNameBox = new TextBox(); 
    private Button btnShowControls = new Button();
    
    MyForm()
    {
      this.Text = "Controls in the raw";

      // Add a new text box.
      firstNameBox.Text = "Superman";
      firstNameBox.Size = new Size(160, 60);
      firstNameBox.Location = new Point(10, 10);
      this.Controls.Add(firstNameBox);

      // Add a new button.
      btnShowControls.Text = "Examine Controls collection";
      btnShowControls.Size = new Size(90, 90);
      btnShowControls.Location = new Point(10, 70);
      btnShowControls.Click += 
        new EventHandler(btnShowControls_Clicked);
      this.Controls.Add(btnShowControls);
      CenterToScreen();

    }
    protected void btnShowControls_Clicked(object sender, EventArgs e)
    {
      Control.ControlCollection coll = this.Controls;
      foreach(Control c in coll) {
        if(c != null)
          Console.WriteLine(c.Text, "Index numb: " + coll.GetChildIndex(c, false));   
      }
    }

        public static int Main(string[] args)
        {
      Application.Run(new MyForm());
      return 0;
        }
    }