winform 隐藏界面模块

打开界面时的隐藏，写于Form_A界面，要打开的是Form_B界面        
Form_A界面中在触发事件里这样写：
private void button1_Click(object sender, EventArgs e)
        {
            try
            {
                Form_B B = new Form_B(this);
                this.Hide();
                B.Show();
                //this.Close();
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }

Form_B界面中，在public partial class内添加/修改以下内容，其中初始化窗口部分可要可不要，要在FormB关闭时触发的内容，最好从界面的触发绑定处添加，而不是直接复制该程序
        private Form_A returnFormA = null;
        public get_data(Form_A FA)
        {
            InitializeComponent();

            #region 初始化窗口
            this.FormBorderStyle = FormBorderStyle.FixedSingle;
            this.MaximizeBox = false;
            this.StartPosition = FormStartPosition.CenterParent;
            #endregion

            this.returnForm1 = FA;

        }

        private void FormB_FormClosing(object sender, FormClosingEventArgs e)
        {
            //恢复FormA
            this.returnFormA.Visible = true;
        }