看看 ^ ]搜索结果.

客户端服务器通信产生了成千上万的线程.首先尝试使用Google.始终.

Have a look on this[^] search results.

Thousands of threads come up with client server communication. Give a try on google first. Always.

开始阅读一些CodeProject文章，这些文章提供了可解决您的问题的现有类:
在C#.NET 2.0中使用套接字应用程序进行文件传输 [ ^ ]
C#中的TCP客户端服务器简介 [ ^ ]
使用C#的简单客户端-服务器交互 [文件传输协议(FTP)客户端 [使用TCP发送文件 [

Start reading through some CodeProject articles that provide existing classes to solve your problem:
File Transfer using Socket Application in C# .NET 2.0[^]
Introduction to TCP client server in C#[^]
Simple Client-server Interactions using C#[^]
File Transfer Protocol (FTP) Client[^]
Sending Files using TCP[^]