public string GetAllEmployees()
        {
            Dictionary <string, string> employees = _employeeFacade.GetEmployeeIds();
            string employeesInfo = string.Empty;

            foreach (var employee in employees)
            {
                employeesInfo += string.Format("Id: {0}, Type: {1}", employee.Key, employee.Value);
            }

            return(employeesInfo);
        }