C# 父子視窗應用 record

   private void button1_Click(object sender, EventArgs e)
   {
   Form2 frm2 = new Form2();
   frm2.FormClosed += new FormClosedEventHandler(frm2_FormClosed);
   frm2.Show();//開啟子視窗
   this.Hide();//隱藏父視窗
   }

   void frm2_FormClosed(object sender, FormClosedEventArgs e)
   {
   this.Show();//子視窗關閉時,父視窗再顯示出來
   }