private void rbNew_MouseDown(object sender, MouseEventArgs e)
        {
            rbNew.Select();
            NewLineNumberTextBox.DeselectAll();

            rbNew.AutoWordSelection = true;
            rbNew.AutoWordSelection = false;
        }
 private void rbNew_VScroll(object sender, EventArgs e)
 {
     if (!loading)
     {
         NewLineNumberTextBox.Text = "";
         AddLineNumbers(true);
         NewLineNumberTextBox.Invalidate();
     }
 }