private void UsersButton_Click(object sender, EventArgs e)
        {
            addUser form = new addUser(mc, Model); // All forms get passed the formContainer and a reference to the model object.

            form.Dock = DockStyle.Fill;
            form.Show();
        }
        private void button1_Click(object sender, EventArgs e)
        {
            addUser form = new addUser(mc, Model);

            form.Dock = DockStyle.Fill;
            form.Show();
            this.Hide();
        }