true
. And in the client area, it is where all the MDI child forms placed to the parent form are displayed.
private void closeChildForm() { foreach(Form frm in this.MdiChildren) { frm.Close(); } } private void showFrm(Form frm) { this.IsMdiContainer = true; frm.MdiParent = this; frm.Show(); }
private void button1_Click(object sender, EventArgs e) { closeChildForm(); showFrm(frm); }