Asp.Net Core 2.2 使用 HttpClient 連結 SSL網址處理方法

參考： [faq]解決C#呼叫有ssl憑證問題的網站出現遠端憑證是無效的錯誤問題

加上 handler處理

var handler = new HttpClientHandler();

handler.ClientCertificateOptions = ClientCertificateOption.Manual;

handler.ServerCertificateCustomValidationCallback =

    (httpRequestMessage, cert, cetChain, policyErrors) =>

{   

  return true;

};

var client = new HttpClient(handler);