.NET C# 使用HttpClient时忽略HTTPS证书

添加System.Net.Http.WebRequest的引用
new一个WebRequestHandler对象
将WebRequestHandler对象的ServerCertificateValidationCallback设为delegate { return true; };
使用该WebRequestHandler对象new HttpClient对象
使用该HttpClient对象即可
相关代码如下：

var handler = new WebRequestHandler();
handler.ServerCertificateValidationCallback = delegate { return true; };
var httpClient = new HttpClient(handler);
httpClient.BaseAddress = new Uri("https://www.baidu.com");
var response = await httpClient.GetAsync("https://www.baidu.com");