private void addButton_Click(object sender, EventArgs e)
 {
     addStaff r = new addStaff(Model); // All forms get passed the formContainer and a reference to the model object.
     this.Text = this.Text + "-Staff";
     r.Dock = DockStyle.Fill;
     r.MdiParent = this.MdiParent;
     r.Show();
     r.WindowState = FormWindowState.Maximized;
 }
 private void button4_Click(object sender, EventArgs e)
 {
     addStaff form1 = new addStaff(Model); // All forms get passed the formContainer and a reference to the model object.
     form1.MdiParent = this.MdiParent;
     form1.Show();
 }