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.net - Accept self-signed TLS/SSL certificate in VB.NET

I'm searching for a way to validate (or bypass validation for) self-signed SSL certificates using VB.NET. I found code to do this in C# and tried converting it into VB code, but I'm not having any luck.

Here is the C# code: How do I use WebRequest to access an SSL encrypted site using https?

Here is what I tried:

Imports System
Imports System.Net
Imports System.Security.Cryptography.X509Certificates

Public Class clsSSL
    Public 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
End Class

Then before the WebRequest I have this line of code which gives me an error.

ServicePointManager.ServerCertificateValidationCallback =
    New System.Net.Security.RemoteCertificateValidationCallback(AcceptAllCertifications)

The error message is:

Delegate 'System.Net.Security.RemoteCertificateValidationCallback' requires an 'AddressOf' expression or lambda expression as the only argument to its constructor.

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1 Answer

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by (71.8m points)

In VB.Net, you need to write

ServicePointManager.ServerCertificateValidationCallback = AddressOf AcceptAllCertifications

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