VS - working with Mdi_Child in front of objects in Mdi_Parent

I need to keep a Child Form above Objects such as Panels, Buttons, Labels, etc. located in Form_Parent. I have tried BringToFront() in the Form but it does not resolve, the objects remain in front of the Form_Child.

Is there any way to solve it?

Here's a picture:

Open application with Form_Child closed, Panel01 object in the background of Form_Parent.

Application now open with the Form_Child open, Panel01 object continues in front of the Form_Child.

My code to open Frm_Child.

        Child = new frmChild();
        Child.MdiParent = this;
        Child.Show();