winform中的enter和esc按键监控

         当前textbox1按回车到textbox2中去，按esc退出当前窗口

public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();

            textBox1.TabIndex = 1;

            textBox2.TabIndex = 2;

            this.textBox1.KeyPress += new System.Windows.Forms.KeyEventHandler(this.ListKey);

            this.textBox2.KeyPress += new System.Windows.Forms.KeyEventHandler(this.ListKey);

        }

        private vo