CS模式，客户端页面加载

public MainForm()
{
    //1、初始化视图
    InitializeComponent();
    //2、加载程序
    this.Load += new System.EventHandler(this.MainForm_Load);
    //4、窗体关闭之前
    this.FormClosing += (s, r) =>
    {

    };
    //5、窗体关闭
    this.Closed += (s, r) =>
    {
        this.Close();
    };
}
private void MainForm_Load(object sender, EventArgs e)
{
}