vb.net 请求被中止: 未能创建 SSL/TLS...(方案)

Public Shared Function AcceptAllCertifications(ByVal sender As Object, ByVal certification As System.Security.Cryptography.X509Certificates.X509Certificate, ByVal chain As System.Security.Cryptography.X509Certificates.X509Chain, ByVal sslPolicyErrors As System.Net.Security.SslPolicyErrors) As Boolean
        Return True
    End Function

 Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
        System.Net.ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12
        ServicePointManager.Expect100Continue = True
    End Sub