NamedPipeServerStream和NamedPipeServerClient上的示例需要PipeDirection.InOut

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

class Program
{
    static void Main()
    {
        using (NamedPipeServerStream pipeServer = new NamedPipeServerStream("testpipe", PipeDirection.InOut))
        {
            Console.WriteLine("等待客户端连接...");
            pipeServer.WaitForConnection();

            Console.WriteLine("客户端已连接。");

            using (StreamReader reader = new StreamReader(pipeServer))
            using (StreamWriter writer = new StreamWriter(pipeServer))
            {
                while (true)
                {
                    string request = reader.ReadLine();
                    Console.WriteLine("接收到客户端请求: " + request);

                    string response = "服务器响应: " + request.ToUpper();
                    writer.WriteLine(response);
                    writer.Flush();
                }
            }
        }
    }
}

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

class Program
{
    static void Main()
    {
        using (NamedPipeClientStream pipeClient = new NamedPipeClientStream(".", "testpipe", PipeDirection.InOut))
        {
            Console.WriteLine("连接到服务器...");
            pipeClient.Connect();

            Console.WriteLine("已连接到服务器。");

            using (StreamReader reader = new StreamReader(pipeClient))
            using (StreamWriter writer = new StreamWriter(pipeClient))
            {
                while (true)
                {
                    Console.Write("请输入要发送给服务器的消息: ");
                    string message = Console.ReadLine();

                    writer.WriteLine(message);
                    writer.Flush();

                    string response = reader.ReadLine();
                    Console.WriteLine("接收到服务器响应: " + response);
                }
            }
        }
    }
}