c# - 我是否必须在每个请求前添加 SecurityProtocol？VB.Net / C#

Question

嘿，我有一个请求 URL 并修复 SSL 问题的程序，我发现必须在其前面添加以下代码：

Dim serverCertificateValidationCallback As [Delegate] = ServicePointManager.ServerCertificateValidationCallback
System.Net.ServicePointManager.ServerCertificateValidationCallback = Function(se As Object, cert As System.Security.Cryptography.X509Certificates.X509Certificate, chain As System.Security.Cryptography.X509Certificates.X509Chain, sslerror As System.Net.Security.SslPolicyErrors) True
ServicePointManager.Expect100Continue = True
ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12
ServicePointManager.SecurityProtocol = CType(3072, SecurityProtocolType)

那么我是否必须在主窗体加载事件中只添加一次此代码，还是必须在每个函数/子/窗体中添加它？

标签： c#vb.netsecurityprotocols

Answer 1

ServicePointManager是静态的，因此只需设置一次。不过考虑一下：

来源：https ://docs.microsoft.com/en-us/dotnet/api/system.net.servicepointmanager?view=net-5.0