public IEnumerable <Employee> GetEmployees()
 {
     try
     {
         return(_employee.GetEmployees().OrderBy(x => x.FirstName).ToList());
     }
     catch (Exception ex)
     {
         _errorLog.AddErrorLog(new ErrorLog {
             LogDate = DateTime.Now, LogDescription = ex.StackTrace.ToString(), ErroLogPage = "GetEmployees"
         });
         return(null);
     }
 }