把Dictionary绑定到combox

 private void bindCBSessionTimeOut()
        {
            IList<DictionaryEntry> List = new List<DictionaryEntry>();
            List.Add(new DictionaryEntry("30 mins", TimeSpan.FromMinutes(30)));
            List.Add(new DictionaryEntry("1 hours", TimeSpan.FromHours(1)));
            List.Add(new DictionaryEntry("2 hours", TimeSpan.FromHours(2)));
            List.Add(new DictionaryEntry("3 hours", TimeSpan.FromHours(3)));
            List.Add(new DictionaryEntry("4 hours", TimeSpan.FromHours(4)));
            try
            {
                cbSessionTimeOut.DataSource = List;
                cbSessionTimeOut.DisplayMember = "Key";
                cbSessionTimeOut.ValueMember = "Value";
            }
            catch (Exception ce)
            {

                Console.WriteLine(ce.ToString()); ;
            }
        }

代码片段，关键：List添加的是要多个DictionaryEntry