command prompt do not opens up when calling (.exe) console application

Question

command prompt do not opens up when calling (.exe) console application

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO.Ports;
using System.IO;
using System.Runtime.InteropServices;


namespace PortDataReceived
{
    class Program
    {
        static void Main(string[] args)
        {
            SerialPort mySerialPort = new SerialPort("COM1");
            if (mySerialPort.IsOpen == true) mySerialPort.Close();
            mySerialPort.BaudRate = 2400;
            mySerialPort.Parity = Parity.None;
            mySerialPort.StopBits = StopBits.One;
            mySerialPort.DataBits = 8;
            mySerialPort.Handshake = Handshake.None;
            mySerialPort.Open();
         // Console.WriteLine("Press any key to continue...");
          
            Console.ReadLine();
           
            mySerialPort.ReadTimeout = 100;


            string indata = mySerialPort.ReadExisting();
            Console.WriteLine(indata);
           
            if (string.IsNullOrEmpty(indata))
            {
                StringBuilder builder = new StringBuilder();
                StreamWriter sw = new StreamWriter(@"c:\arjun.txt", true);
                sw.WriteLine(indata);
                sw.Close();

            }
            else
            {
                StringBuilder builder = new StringBuilder();

                for (int i = 0; i < indata.Length-8; i += 8)
                {

                    string section = indata.Substring(i, 8);

                    //int ascii = 0;
                    string ascii = "";
                    try
                    {
                        //ascii = Convert.ToInt32(section, 2);
                        ascii = section;
                        StreamWriter sw = new StreamWriter(@"c:\arjun.txt", true);

                        foreach (char c in section)
                        {
                            if (Char.IsLetterOrDigit(c))
                            {
                                builder.Append(c);
                            }
                        }

                        sw.WriteLine(builder.ToString());
                        sw.Close();
                        break;
                    }
                    catch(Exception e)

                    {

                        throw e;
                       

                    }
                     // builder.Append((char)ascii);
                }

               
              //  Console.WriteLine(builder.ToString());
               // Console.WriteLine(indata);
                //Console.WriteLine("Data Received:");
                //Console.Write(indata);
               //  Console.ReadKey();
                mySerialPort.Close();

            }



        }
    }
}