子窗体C的子窗体B如何使用Winform紧随主窗体A最小化

如何解决子窗体C的子窗体B如何使用Winform紧随主窗体A最小化

如何使用Winform在主窗体A之后最小化子窗体C的子窗体B。 在主窗体A之后调用子窗体B。 然后，子窗体B调用B自己的子窗体C。

    int i = 0;
    private void formAOpenFormBToolStripMenuItem_Click(object sender,EventArgs e)
    {
        var fb = new FormB();
        fb.TopLevel = false;      
        fb.Dock = DockStyle.Fill;
        fb.FormBorderStyle = FormBorderStyle.SizabletoolWindow;
        fb.Show();
        TabPage Page = new TabPage();
        Page.Name = "Page" + i;
        Page.Text = "tabPage" + i;
        Page.TabIndex = i;
        this.tabControl1.Controls.Add(Page);
        tabControl1.SelectedTab = Page;     
        tabControl1.TabPages[i].Controls.Add(fb);
        tabControl1.TabPages[i].Text = fb.Text+i;
        i++;
    }
    private void formBButton1_Click(object sender,EventArgs e)
    {
        var frmC = new FormC();
        frmC.FormBorderStyle = FormBorderStyle.SizabletoolWindow;
        frmC.Owner = this;
        frmC.Show();
    }
    private void formBButton2_Click(object sender,EventArgs e)
    {
        var frmC = new FormC();
        frmC.FormBorderStyle = FormBorderStyle.SizabletoolWindow;
        frmC.TopLevel = false;
        frmC.Parent = this;
        frmC.Show();               
    }