private void toolStripMenuItem2_Click(object sender, EventArgs e) { if (this.MdiChildren.Length != 0) { foreach (Form child in this.MdiChildren) { child.Close(); } } patientsMenu = new Patients(this); patientsMenu.Show(); patientsMenu.Left = 0; patientsMenu.Top = 0; patientsMenu.Size = this.ClientRectangle.Size; patientsMenu.WindowState = FormWindowState.Maximized; }