c# - Where to place RemoteCertificateValidationCallback?

Question

I have the same problem as here: How to disable "Security Alert" window in Webbrowser control

I like the answer, but where am I going to place the ServicePointManager.ServerCertificateValidationCallback = new RemoteCertificateValidationCallback(ValidateServerCertificate);?

I get the "Invalid certification" message after I submit the login page of my school network with this code:

HtmlElementCollection ellements = webBrowser.Document.GetElementsByTagName("input");
foreach (HtmlElement ellement in ellements)
{
    if (ellement.OuterHtml == "<INPUT onclick="this.value = 'Submitted'" value=" Login " type=submit>")
    {
        ellement.InvokeMember("click");
        this.DialogResult = DialogResult.OK;
        break;
    }
}

Answer 1

You should put the following at any point before you show the web browser control / submit the page:

ServicePointManager.ServerCertificateValidationCallback += 
    new RemoteCertificateValidationCallback((sender, certificate, chain, policyErrors) => { return true; });

(This is exactly the same as the example answer in the linked question, but the callback method is anonymous so its a little more compact).