private void addEmployeeToolStripMenuItem_Click(object sender, EventArgs e)
        {
            Employee_form empForm = new Employee_form();

            empForm.MdiParent = this;
            empForm.Show();
        }
        private void Add_Emp_Click(object sender, EventArgs e)
        {
            Employee_form emp1 = new Employee_form();

            emp1.Show();
            this.Hide();
        }