我在编写程序段中用到了子窗体，子窗体在事件调用中不能正常显示，这个问题是否与父窗体中用的panel控件有关。
  Form2 frmChild1=null;

        
        private void 退出ToolStripMenuItem_Click_1(object sender, EventArgs e)
        {
            this.Close();
        }

        private void 数据ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            if (frmChild1 == null)
            {
                frmChild1 = new Form2();
                frmChild1.MdiParent = this;
                this.frmChild1.TopMost = true;
                frmChild1.Show();

            }
            else
            {
                if (frmChild1.IsDisposed)
                {
                    frmChild1 = new Form2();
                }
                frmChild1.MdiParent = this;
                frmChild1.Show();
                frmChild1.Focus();

            }