Textbox add new line

Question

Hi corner,

 

  <Button Content="Button" Grid.Row="0" Grid.Column="1" Margin="8" Height="20" Width="75" Click="Button_Click"/>
<TextBox Name="textbox1" Text="hello" Width="50" Grid.Row="1" Grid.Column="0" />

 

 private void Button_Click(object sender, RoutedEventArgs e)
{
   How to add new input textbox in row?
}

 

Any idea?

Thanks