[C#] Web API - HttpClient 入門

http://marcus116.blogspot.com/2018/02/c-web-api-httpclient.html

https://dotblogs.com.tw/joysdw12/2013/06/03/web-api-httpclient-windows-form

https://csharpkh.blogspot.com/2017/10/c-httpclient-webapi.html