文本框自动补全

   //设置属性 初始化赋值
            //AutoCompleteStringCollection acsc = new AutoCompleteStringCollection();
            //acsc.Add("121212");
            //acsc.Add("121");

            //this.textBox1.AutoCompleteMode = System.Windows.Forms.AutoCompleteMode.Suggest;
            //this.textBox1.AutoCompleteSource = System.Windows.Forms.AutoCompleteSource.CustomSource;
            //this.textBox1.AutoCompleteCustomSource = acsc;