如何在C#中通过combobox来实现本地IP地址选择？

 1         private void server_adder_listbox_DropDown(object sender, EventArgs e)
 2         {
 3 
 4             server_adder_listbox.Items.Clear(); //每次弹出下来列表时，将原表中的内容清除          
 5  
 6             try
 7             {
 8                 foreach (object local_ip in Dns.GetHostAddresses(Dns.GetHostName()))
 9                 {
10                     server_adder_listbox.Items.Add(local_ip.ToString());  //将本地IP地址内容通过foreach遍历。同时以字符串形式添加到combobox中
11                 }
12 
13             }
14 
15             catch (Exception ex)
16             {
17                 MessageBox.Show(ex.ToString());          
18             }
19 
20         }