c#异步socket

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Net;
using System.Net.Sockets;
namespace server
{
class Program
{
//服务端buffer为4字节
static byte[] buffer = new byte[1024];
static string Json = "";
static int connt = 0;
static void Main(string[] args)
{
Console.WriteLine("[Server]");
try
{
Socket socketServer = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);

socketServer.Bind(new IPEndPoint(IPAddress.Parse("127.0.0.1"), 4444));
socketServer.Listen(int.MaxValue);
Console.WriteLine("服务端已启动，等待连接...");
//接收连接
Socket ts = socketServer.Accept();
Console.WriteLine("客户端已连接");

//开始异步接收
ts.BeginReceive(buffer, 0, buffer.Length, SocketFlags.None, new AsyncCallback(ReceiveCallback), ts);
Console.WriteLine(Json);
Console.WriteLine(Convert.ToString(connt));
Console.ReadKey();
}
catch (Exception e)
{

Console.WriteLine(e.Message);
}
}

static void ReceiveCallback(IAsyncResult result)
{
Socket ts = (Socket)result.AsyncState;
ts.EndReceive(result);
result.AsyncWaitHandle.Close();
Console.WriteLine("收到消息");
Json += Encoding.ASCII.GetString(buffer);
//清空数据，重新开始异步接收
buffer = new byte[buffer.Length];
connt += 1;
ts.BeginReceive(buffer, 0, buffer.Length, SocketFlags.None, new AsyncCallback(ReceiveCallback), ts);
}
}
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Net;
using System.Net.Sockets;
namespace client
{
class Program
{
static void Main(string[] args)
{
Console.WriteLine("[Client]");
try
{
Socket socketClient = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
socketClient.Connect(IPAddress.Parse("127.0.0.1"), 4444);
Console.WriteLine("发送消息：");
System.IO.StreamReader sr = new System.IO.StreamReader(@"C:\1.txt");
string sendStr = sr.ReadLine();
//获取发送内容
while (true)
{
Console.WriteLine("发送消息：");
//同步发送数据
socketClient.Send(Encoding.ASCII.GetBytes(sendStr));
}
}
catch (Exception e)
{
Console.WriteLine(e.Message);
Console.WriteLine("按任意键退出");
Console.ReadKey();
}
}
}
}