How to disable “Security Alert” window in Webbrowser control

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This should do it:

public static bool ValidateServerCertificate(object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors sslPolicyErrors)
{
    return true;
}

ServicePointManager.ServerCertificateValidationCallback = new RemoteCertificateValidationCallback(ValidateServerCertificate);

Obviously, blindingly allowing certificates is a security risk. Be careful.

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