C# TextBox自动完成

            //定义一个List
            List<string> list = new List<string>();
             //添加数组
            list.AddRange(new string[] { "11", "12", "13", "22", "23", "24" });
            //设置文本框自动完成源
            textBox1.AutoCompleteSource = AutoCompleteSource.CustomSource;
            //设置文本框自动完成模式
            textBox1.AutoCompleteMode = AutoCompleteMode.Suggest;
            //循环添加自动完成源的数据
            foreach (string s in list)
                textBox1.AutoCompleteCustomSource.Add(s);