我用c#写了一个简单的服务器端和客户端代码。一旦客户端连接上，服务器将依次向客户端发送欢迎消息、文件大小和字符串，客户端将显示它。客户端将把字符串转换为字符串数组并显示它。之后，客户端将发送一个id到服务器，服务器将显示它。但问题是，客户端不能正确显示。当我在运行服务器后运行客户端程序时，它显示以下内容，而它应该在单行中显示每条消息。

welcome1.cpp,.jpg,.png

此外，在客户端，我所写的显示转换后的字符串数组的行，根本不工作，之后的行也没有执行。看起来，代码挂起了。我已经在代码里做了标记。我的示例代码如下:

服务器:

using System;
using System.Collections.Generic;
using System.Net;
using System.Net.Sockets;
using System.IO;
using System.Text;
namespace server
{
    class Program
    {
        static void Main(string[] args)
        {
            // Listen on port 1234.
            try
            {
                TcpListener tcpListener = new TcpListener(IPAddress.Any, 1234);
                tcpListener.Start();              
                byte[] data = new byte[1024];
                // Infinite loop to connect to new clients.
                while (true)
                {
                    // Accept a TcpClient
                    TcpClient tcpClient = tcpListener.AcceptTcpClient();
                    NetworkStream ns = tcpClient.GetStream();
                    //sending welcome message
                    string welcome = "welcome";
                    ns.Write(Encoding.ASCII.GetBytes(welcome), 0, welcome.Length);
                    ns.Flush();
                    //sending file size
                    string fsize = "1";
                    ns.Write(Encoding.ASCII.GetBytes(fsize), 0, fsize.Length);
                    ns.Flush();
                    //sending extensions
                    string[] extensions = { ".cpp", ".jpg", ".png" };
                    string str = string.Join(",", extensions);
                    Console.WriteLine(str);
                    ns.Write(Encoding.ASCII.GetBytes(str), 0, str.Length);
                    ns.Flush();
                    //receiving id
                    int recv = ns.Read(data, 0, data.Length);
                    string id = Encoding.ASCII.GetString(data, 0, recv);
                    Console.WriteLine(id);                   
                }
            }
            catch (Exception e)
            {
                Console.Write(e.Message);
            }
            Console.Read();
        }
    }
}

using System;
using System.Collections.Generic;
using System.Net;
using System.Net.Sockets;
using System.IO;
using System.Text;
namespace client
{
    class Program
    {
        static void Main(string[] args)
        {
            try
            {                
                TcpClient tcpClient = new TcpClient("127.0.0.1", 1234);               
                NetworkStream ns = tcpClient.GetStream();
                byte[] data = new byte[1024];
                StreamWriter sWriter = new StreamWriter(tcpClient.GetStream());
                //receiving welcome message
                int recv = ns.Read(data, 0, data.Length);
                string message = Encoding.ASCII.GetString(data, 0, recv);
                Console.WriteLine(message);
                //receive filesize
                int recv2 = ns.Read(data, 0, data.Length);
                string message2 = Encoding.ASCII.GetString(data, 0, recv2);
                Console.WriteLine(message2);
                //receiving extensions
                int recv1 = ns.Read(data, 0, data.Length);
                string message1 = Encoding.ASCII.GetString(data, 0, recv1);
                Console.WriteLine(message1);

                var array2 = message1.Split(',');

                foreach (string s in array2) //from this line the program      isn't working
                {
                    Console.WriteLine(s);
                }
                string input = Console.ReadLine();
                ns.Write(Encoding.ASCII.GetBytes(input), 0, input.Length);
                ns.Flush();
            }
            catch (Exception e)
            {
                Console.Write(e.Message);
            }
            Console.Read();
        }
    }
}

代码有什么问题?