c# 文件传输

private Socket s;
TcpListener tl;
public void lis()
{
string path = "d:\\1.cs";                 //要传入文件的路径
tl = new TcpListener(9999);
tl.Start();
Console.WriteLine("等待接受");
s = tl.AcceptSocket();
FileStream fs = new FileStream(path, FileMode.OpenOrCreate, FileAccess.Write);   //注意这个的属性和send端有所不同
BinaryWriter binarywrite = new BinaryWriter(fs);
int count;
byte[] b = new byte[4098];
while ((count = s.Receive(b, 4098, SocketFlags.None)) != 0)             //这个是接受文件流
{
binarywrite.Write(b,0,count);                          //将接收的流用写成文件
}
binarywrite.Close();
fs.Close();
s.Close();
tl.Stop();
Console.WriteLine("文件传输完毕");