public override void DisplayEmployeeData()
        {
            //IDataFormatter dataFormatter = new SqlDataFormatter();
            string empData = _dataFormatter.FormatEmployeeData();

            Console.WriteLine("Displaying the Employee details...");
            Console.WriteLine(empData);
        }
        public override void DisplayEmployeeData()
        {
            //IDataFormatter dataFormatter = new OracleDataFormatter(new OracleDataAccess());
            string empData = _dataFormatter.FormatEmployeeData();

            Console.WriteLine("Displaying Employee Data for Oracle as below.");
            Console.WriteLine(empData);
        }