Radiobuttons added on pageload....

public void AddRadioButtons()
{
  RadioButton rBut1 = new RadioButton();
  rBut1.Location = new Point(50, 50);
 
  rBut1.AutoCheck = true;
  rBut1.Text = "Checked";
  rBut1.Checked = true;
 
  rBut1.CheckedChanged += new EventHandler(rBut_CheckedChanged);
 
  Controls.Add(rBut1);
 
  RadioButton rBut2 = new RadioButton();
  rBut2.Location = new Point(50, 80);
 
  rBut2.AutoCheck = true;
  rBut2.Text = "UnChecked";
  rBut2.Checked = false;
 
  rBut2.CheckedChanged += new EventHandler(rBut_CheckedChanged);
 
  Controls.Add(rBut2);
}
 
private void rBut_CheckedChanged(object sender, System.EventArgs e)
{
  if (sender is RadioButton)
  {
    RadioButton radiobutton = sender as RadioButton;
    if (radiobutton.Checked)
    {
      radiobutton.Text = "Checked";
    }
    else
    {
      radiobutton.Text = "UnChecked";
    }
  }
}