我的c＃程序没有打印

Question

我在C＃中使用了这段代码。该程序应该使用财务打印机打印。我运行程序时不会抛出错误，但它是

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using FiscPrinter = FiscPrnSys.FiscPrnIface;

namespace IncortexLibrary
   {
       public class Class1
       {
        public List<String> salesITems = new List<String>();
        public String user;
        public String shop;
        public double total;
        public double subtotal;
        public String tax;
        public short data = (short) 8;
        public short parity = (short)0;
        public short stopbit = (short)1;

    public void PrintBon()
    {
        FiscPrnSys.FiscPrnIface FiscPrinter = new FiscPrnSys.FiscPrnIface();
        FiscPrinter.Connect("COM2", 9600, data, parity, stopbit);
        FiscPrinter.TestPrinter((short)48, "1,0,1", "HELLO");
        FiscPrinter.Sale("TEST ITEM 1", "A", 2, 2, 0);
        FiscPrinter.Sale("TEST ITEM 1", "A", 2, 2, 0);
        FiscPrinter.Sale("TEST STOCK ITEMS ZERO VAT", "B", 2, 2, 0);
        FiscPrinter.Sale("Cooking Fat Always Ultra", "B", 2, 2, 0);
        FiscPrinter.PrintFiscalText("TEST STOCK ITEMS VATABLE"); 
        FiscPrinter.Sale("001000124", "A", 2, 2, 0);
        FiscPrinter.PrintFiscalText("Kimbo 1 Kg");
        FiscPrinter.Sale("598699484", "A", 5, 5, 0);
        FiscPrinter.PrintFiscalText("Tily Cooking Fat");
        FiscPrinter.Sale("484949404", "A", 2, 2, 0);
        FiscPrinter.Sale("Always ULtra", "A", 10, 2, 0);
        FiscPrinter.Disconnect();

    }

    public void setUser(String user)
    {
        this.user = user;
    }

    public void setShop(String shop)
    {
        this.shop = shop;
    }

    public void addSaleItem(String item)
    {
        salesITems.Add(item);

    }

    public void setDouble(double pTotal)
    {
        this.total = pTotal;
    }

    public void setSubTotal(double sTotal)
    {
        this.subtotal = sTotal;
    }

    public void setTax(String pTax)
    {
        this.tax = pTax;
    }



}
}

和其他课程

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using IncortexLibrary;

namespace ConsoleApp
{ 
     class Program
     {
        static void Main(string[] args)
        {  
            Class1 printer = new Class1();
            printer.PrintBon();

        }
    }
}

可能是什么问题？我已经包含了所有必需的库。