c# mdi多窗體

 private void Form3_Load(object sender, EventArgs e)
        {
            this.IsMdiContainer = true;// ,父窗體屬性mdicontainer為true
            //學習MDI多窗體
            Form. form11 = new Form();
            form11.Show();
            form11.MdiParent = this;//mdiparent屬性設定父窗體

            Form. form12 = new Form();
            form12.Show();
            form12.MdiParent = this;//mdiparent屬性設定父窗體
            this.LayoutMdi(MdiLayout.Cascade);//排列父窗體內的子窗體排列方式

                                 
        }