{"type":"rich","categories":["C#","vb.net"],"height":"190","author_url":"https://blog.hatena.ne.jp/shikaku/","version":"1.0","published":"2018-09-06 15:46:30","blog_url":"https://blog.systemjp.net/","image_url":null,"provider_name":"Hatena Blog","author_name":"shikaku","title":".net\u306eHTTPS\u901a\u4fe1\u3067\u3000System.Net.WebException: \u63a5\u7d9a\u304c\u5207\u65ad\u3055\u308c\u307e\u3057\u305f: \u9001\u4fe1\u6642\u306b\u3001\u4e88\u671f\u3057\u306a\u3044\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u307e\u3057\u305f\u3002\u3000\u3068\u30a8\u30e9\u30fc\u304c\u3067\u305f\u3089 TLS1.2\u306b\u3059\u308c\u3070OK","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fblog.systemjp.net%2Fentry%2F2018%2F09%2F06%2F154630\" title=\".net\u306eHTTPS\u901a\u4fe1\u3067\u3000System.Net.WebException: \u63a5\u7d9a\u304c\u5207\u65ad\u3055\u308c\u307e\u3057\u305f: \u9001\u4fe1\u6642\u306b\u3001\u4e88\u671f\u3057\u306a\u3044\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u307e\u3057\u305f\u3002\u3000\u3068\u30a8\u30e9\u30fc\u304c\u3067\u305f\u3089 TLS1.2\u306b\u3059\u308c\u3070OK - shikaku&#39;s blog\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","blog_title":"shikaku's blog","width":"100%","url":"https://blog.systemjp.net/entry/2018/09/06/154630","provider_url":"https://hatena.blog","description":"WebClient\u3067\u30a2\u30af\u30bb\u30b9\u3057\u305f\u3089\u4f8b\u5916\u304c\u3067\u305f\u3002 TLS1.0\u30011.1\u306e\u5ec3\u6b62\u304c\u539f\u56e0\u3089\u3057\u3044\u3002TLS1.2\u306b\u3059\u308b\u306b\u306f ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12; \u5165\u308c\u308b\u3060\u3051\u3067\u4e00\u5fdcOK\u3002 ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12; using (var client = new WebClient()) { var url = \"https://www.sample.com/sample\"; var keys = new S\u2026"}