在WINDOWSFORM中，怎樣給COMBOBOX增加VALUE

using System.Collections;

ArrayList list = new ArrayList();
list.Add (new DictionaryEntry ("1","投诉"));
list.Add (new DictionaryEntry ("2","举报"));
list.Add (new DictionaryEntry ("3","建议"));
list.Add (new DictionaryEntry ("4","表扬"));
list.Add (new DictionaryEntry ("5","其它"));

cbBoxLeiXing.DataSource =list; 
cbBoxLeiXing.DisplayMember ="Value";
cbBoxLeiXing.ValueMember ="Key";