Http协议（一）基础知识

https://blog.csdn.net/qq_16587307/article/details/79912029      关于c#的HttpClient的特性

https://blog.csdn.net/lishimin1012/article/details/82800983

https://www.cnblogs.com/dudu/p/csharp-httpclient-attention.html   C#中HttpClient使用注意：预热与长连接

https://www.cnblogs.com/whuanle/p/11656734.html   C# HttpClient 请求认证、数据传输笔记

http://www.cocoachina.com/articles/111749   c#-具有HttpClientFactory实现的动态代理

https://www.cnblogs.com/dudu/p/http-client-factory.html   .NET Core 中 HttpClientFactory 如何解决 HttpClient 臭名昭著的问题

https://docs.microsoft.com/zh-cn/aspnet/core/fundamentals/http-requests?view=aspnetcore-2.2#consumption-patterns

https://www.cnblogs.com/JerryMouseLi/p/12080618.html    在net Core3.1上基于winform实现依赖注入实例