c# - How to pipe to Console in Excel?

Question

I'm trying to pipe information between excel and another console for learning.

I have a simple pipe example that works between 2 separate C# console programs. I'm now trying to get it to work with one end being Excel, and another being just a regular console application. I am fairly new to Named Pipes.

For the set up in Excel, a form will appear when a ribbon button is clicked and then a console will appear when a button on that form is clicked. When this console appears, there is no output on the console which is problem one. I've looked at process.StartInfo.RedirectStandardOutput = true; but I don't think that is the answer since its not working. I feel like this is an easy fix.

I haven't found any documentation on trying to pipe between applications like excel. I've only found simple examples on piping between 2 simple console programs

The second issue I'm having is the error: pipe is broken after the first message is sent.

Exception thrown: 'System.IO.IOException' in System.Core.dll
An unhandled exception of type 'System.IO.IOException' occurred in System.Core.dll
Additional information: Pipe is broken.

Any and all help/direction is appreciated.

ExcelForm

public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void btnPipeA_Click(object sender, EventArgs e)
        {
            using (Process process = new Process())
            {
                process.StartInfo.FileName = "cmd.exe";
                process.StartInfo.UseShellExecute = false;
                process.StartInfo.WindowStyle = ProcessWindowStyle.Normal;       
                process.Start();

                //Client
                var client = new NamedPipeClientStream("PipesOfPiece");
                if (client.IsConnected == false)
                {
                    Console.WriteLine("Waiting to connect to Server...");
                }
                client.Connect();
                StreamReader reader = new StreamReader(client);
                StreamWriter writer = new StreamWriter(client);

                Console.Write("Found a sever to connect to. Send a greeting to the server: ");


                while (true)
                {
                    string input = Console.ReadLine();
                    if (String.IsNullOrEmpty(input)) break;
                    writer.WriteLine(input);
                    writer.Flush();
                    Console.WriteLine("PipeB said: " + reader.ReadLine());

                }
            }
        }

            private void btnClose_Click(object sender, EventArgs e)
        {
            Close();
        }
    }

ConsoleAppPipe

class Program
    {
        static void Main(string[] args)
        {
            StartServer();
        }
        static void StartServer()
        {
            /*Task.Factory.StartNew(() =>
            {*/
            var server = new NamedPipeServerStream("PipesOfPiece");

            if (server.IsConnected == false)
            {
                Console.WriteLine("Currently waiting for a client to connect...");
            }

            server.WaitForConnection();
            
            StreamReader reader = new StreamReader(server);
            StreamWriter writer = new StreamWriter(server);

            Console.Write("A client has connected, awaiting greeting from client... \n");


            while (true)
            {
                var line = reader.ReadLine();
                Console.WriteLine("PipeA said: " + line);
                writer.WriteLine(Console.ReadLine());
                writer.Flush();
            }
        }
    }

This is what shows when I run the the Excel code:

This is what shows when I run the console application code:

-----------------------Update--------------------

button update

private void btnPipeA_Click(object sender, EventArgs e)
        {
            Program.Main();
        }

program

namespace TestNamedPIpeA
{
    public class Program
    {
        
        public static void Main(/*string[] args*/)
        {
            //Client
            var client = new NamedPipeClientStream("PipesOfPiece");
            if (client.IsConnected == false)
            {
                Console.WriteLine("Waiting to connect to Server...");
            }
            client.Connect();
            StreamReader reader = new StreamReader(client);
            StreamWriter writer = new StreamWriter(client);

            Console.Write("Found a sever to connect to. Send a greeting to the server: ");


            while (true)
            {
                string input = Console.ReadLine();
                if (String.IsNullOrEmpty(input)) break;
                writer.WriteLine(input);
                writer.Flush();
                Console.WriteLine("PipeB said: " + reader.ReadLine());

            }
        }
    }
}