I am showing my MDI windows inside the main form but in one part of the splitter panel, like this:

    Form2 f2= new Form2();
    f2.MdiParent = this;
    f2.Parent = this.splitContainer2.Panel2;
    f2.Show();

but the problem is that I cannot cascade them if I write a code like this:

this.LayoutMdi(System.Windows.Forms.MdiLayout.Cascade);

"this" is the parent form. the main form.

Hoe can I cascade them?

thanks all.