1. nuget [有効]
https://api.nuget.org/v3/index.json
</pre>
===サーバー証明書の検証をスキップ===
- https://qiita.com/TsuyoshiUshio@github/items/f238a2a2c1483c287e4b
<pre>
System.Net.Http.HttpRequestException: The SSL connection could not be established
</pre>
<pre>
var httpClientHandler = new HttpClientHandler();
httpClientHandler.ServerCertificateCustomValidationCallback = (message, cert, chain, sslPlicyErrors) => true;
var httpClient = new HttpClient(httpClientHandler);
</pre>