using System.Windows.Forms;

class ex : Form
{
    TabControl tc = new TabControl();
    TabPage tp1 = new TabPage();
    TabPage tp2 = new TabPage();

    TextBox tb1 = new TextBox();
    Button b1 = new Button();

    ex()
    {
        Text = "hello";
        Controls.Add(tc);
        tp1.Text = "Tab1";
        tp2.Text = "Tab2";
        tc.TabPages.Add(tp1);
        tc.TabPages.Add(tp2);
        tp1.Controls.Add(tb1);
        b1.Text = "Example";
        tp2.Controls.Add(b1);
    }

    static public void Main()
    {
        Application.Run(new ex());
    }
}