public EmployeeMgr(IEmployeeSvc repository)
{
this.repository = repository;
this.employeeList = (ApplicationStore<IList<Employee>>)HttpContext.Current.Application["Employee"];
this.groupManagerList = (ApplicationStore<IList<GroupManager>>)HttpContext.Current.Application["GroupManager"];
this.directorList = (ApplicationStore<IList<Director>>)HttpContext.Current.Application["Director"];
if (employeeList == null || groupManagerList == null || directorList == null ||
!employeeList.isValid() || !groupManagerList.isValid() || !directorList.isValid())
refresh();
}