private void addEmployeeToolStripMenuItem_Click(object sender, EventArgs e)
 {
     int employeeID = 0;
     NWUpdateAccount NWaddupdateAccounts = new NWUpdateAccount(employeeID);
     NWaddupdateAccounts.MdiParent = this;
     NWaddupdateAccounts.Show();
     NWaddupdateAccounts.BringToFront();
 }
        public static NWUpdateAccount GetChildInstance(int employeeId)
        {
            if (_updateEmployeeForm == null) //if not created yet, Create an instance
                _updateEmployeeForm = new NWUpdateAccount(employeeId);
            else
            {
                _updateEmployeeForm.Dispose();
                _updateEmployeeForm = new NWUpdateAccount(employeeId);

            }
            return _updateEmployeeForm;  //just created or created earlier.Return it
        }