using System;

public class Program

{

    public static void Main()

    {

        string Peca = "abcdefg" ;

        DateTime Data =new DateTime();

        string Maquina = "0027";

        string Operador = "1154";

        int Sequencial = 2;

​

       Console.WriteLine(Peca.Substring(Peca.Length - 3), Peca.Length);

        String CodBarras = Peca.PadLeft(4, '0').Substring((Peca.Length - 3), Peca.Length)

                        + Data.ToString("ddmmyyyy")

                        + Maquina.PadLeft(5, '0').Substring(0, 5)

                        + Operador.PadLeft(6, '0').Substring(0, 6)

                         + Sequencial.ToString().PadLeft(4, '0');

       Console.WriteLine(CodBarras);

    }

       public void generateCodBarras()

        {

        }

}