c# socket 字符串某些部分变为问号

Question

客户端代码：

Socket ClientSocket;
String IP = "127.0.0.1";
int port = 19222;

IPAddress ip = IPAddress.Parse(IP);  //将IP地址字符串转换成IPAddress实例
ClientSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);//使用指定的地址簇协议、套接字类型和通信协议
IPEndPoint endPoint = new IPEndPoint(ip, port); // 用指定的ip和端口号初始化IPEndPoint实例
ClientSocket.Connect(endPoint);  //与远程主机建立连接


listadd("上报账号密码中。。。");
byte[] message = Encoding.UTF8.GetBytes("/" + username + "//" + password + "///");  //通信时实际发送的是字节数组，所以要将发送消息转换字节
ClientSocket.Send(message);
listadd("发送消息为:" + Encoding.UTF8.GetString(message));
byte[] receive = new byte[1024];
int length = ClientSocket.Receive(receive);  // length 接收字节数组长度
listadd("返回消息为：" + Encoding.UTF8.GetString(receive));
ClientSocket.Close();  //关闭连接
if (Encoding.UTF8.GetString(receive) == "0")
{
  listadd("登录成功！");
}
if (Encoding.UTF8.GetString(receive) == "1")
{
  listadd("密码错误！");
}
if (Encoding.UTF8.GetString(receive) == "2")
{
  listadd("用户未找到！");
}

服务端代码：

Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
socket.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReuseAddress, true);
IPAddress iPAddress = IPAddress.Parse("0.0.0.0");
IPEndPoint endPoint = new IPEndPoint(iPAddress, 19222);
socket.Bind(endPoint);
socket.Listen(10);  //设定最多有10个排队连接请求
Console.WriteLine("建立连接");
Socket socket1 = socket.Accept();

byte[] receive = new byte[1024];
socket1.Receive(receive);
string recv_msg = Encoding.UTF8.GetString(receive);
Console.WriteLine("接收到消息：" + recv_msg);
string username = MidStrEx_New(recv_msg, "/", "//");
string password = MidStrEx_New(recv_msg, "//", "///");
Console.WriteLine("账户：");
Console.WriteLine(username);
Console.WriteLine("密码：");
Console.WriteLine(password);
Console.WriteLine("解密后的密码：");
Console.WriteLine(Decode(password));
byte[] send = Encoding.UTF8.GetBytes("0");
socket1.Send(send);
Console.WriteLine("发送消息为：" + Encoding.UTF8.GetString(send));

Answer 1

解码的时候 试试 ascii 的美国版本解码 别用utf-8
不然就是你本地 环境变量的问题。就这两个思路
ps：求分