1 combobox bind with different Dataset

private void RadioButton_CheckedChanged(object sender, System.EventArgs e)
{
  if (sender is RadioButton)
  {
    RadioButton radiobutton = sender as RadioButton;
    if (radiobutton.Checked)
    {
      comboBox1.DataSource = DataSet1;
    }
    else
    {
      comboBox1.DataSource = DataSet2;
    }

  }
}