public int InsertEmployee(EmployeeDomainModel employee)
 {
     return DAL.InsertEmployee(employee);
 }
 /// <summary>
 /// Hide Home Phone Number Business Rule
 /// </summary>
 /// <param name="obj">EmployeeDomainModel object</param>
 /// <returns>EmployeeDomainModel object; otherwise, Exception.</returns>
 private EmployeeDomainModel HideHomePhone(EmployeeDomainModel obj)
 {
     // apply a business rule.
     if (obj.Title.Contains("Manager"))
     {
         obj.HomePhone = "Not Available";
     }
     return obj;
 }