C# Server using .NET Core Named Pipes

csharpserver_dotnet_namedpipe.cs

using System;
using System.IO;
using System.IO.Pipes;
using System.Text;

class PipeServerBinary
{
    static void Main()
    {
        using (NamedPipeServerStream pipe = new NamedPipeServerStream("testpipe"))
        {
            Console.WriteLine("NamedPipeServerStream object created.");

            // Wait for a client to connect
            Console.Write("Waiting for client connection...");
            pipe.WaitForConnection();

            Console.WriteLine("Client connected.");
            try
            {
                // Read user input and send that to the client process.
                using (BinaryWriter _bw = new BinaryWriter(pipe))
                using (BinaryReader _br = new BinaryReader(pipe))
                {
                    while (true)
                    {
                        //sw.AutoFlush = true;
                        Console.Write("Enter text: ");
                        var str = Console.ReadLine();

                        var buf = Encoding.ASCII.GetBytes(str);     // Get ASCII byte array     
                        _bw.Write((uint)buf.Length);                // Write string length
                        _bw.Write(buf);                              // Write string
                        Console.WriteLine("Wrote: \"{0}\"", str);

                        Console.WriteLine("Let's hear from the client now..");

                        var len = _br.ReadUInt32();
                        var temp = new string(_br.ReadChars((int)len));

                        Console.WriteLine("Received from client: {0}", temp);
                    }
                }
            }
            // Catch the IOException that is raised if the pipe is broken
            // or disconnected.
            catch (IOException e)
            {
                Console.WriteLine("ERROR: {0}", e.Message);
            }
        }
    }
}