Sorting ArrayList Items by Text and not Value

public void OrderDropDowns(ref DropDownList objDDL)
        {
            // ArrayList to keep text and value items within the specified Drop Down
            ArrayList text_list = new ArrayList();
            ArrayList value_list = new ArrayList();
 
            foreach (ListItem li in objDDL.Items)
            {
                if (li.Text != "-Select One-")
                {
                    text_list.Add(li.Text);
                }
            }
            if (text_list.Count >= 8)
            {
                text_list.Sort(0, 4, null);
            }
            else
            {
                text_list.Sort();
            }
 
            foreach (object li in text_list)
            {
                string value = objDDL.Items.FindByText(li.ToString()).Value;
                value_list.Add(value);
            }
 
            // Adding Sorted Items to the Drop Down List
            objDDL.Items.Clear();
            objDDL.Items.Add("-Select One-");
            for (int i = 0; i < text_list.Count; i++)
            {
                if (i != text_list.Count)
                {
                    ListItem objItem = new ListItem(text_list[i].ToString(), value_list[i].ToString());
                    objDDL.Items.Add(objItem);
                }
            }
        }