C# .NET 智能提示(关键词，提示词，联想)

输入 a 后面直接出现以"a"开头的词

//在哪里写都可以，看情况啦
public form()
        {
            InitializeComponent();
            textBox1.AutoCompleteMode = AutoCompleteMode.SuggestAppend;
            textBox1.AutoCompleteSource = AutoCompleteSource.CustomSource;
            textBox1.AutoCompleteCustomSource.Clear();
            
        }

private void Form1_Load(object sender, EventArgs e)
        {
            string[] name = new string[]
            {
               "a", 
               "ab"
               "bc",
            };

             this.textBox1.AutoCompleteCustomSource.AddRange(name);
        }