C# How to Click Button automatically via WebBrowser

Question

The Html code of my click page is :

Answer 1

Try a combination of @adam's suggestion and capitalize Click

private void webBrowser1_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
{
    webBrowser1.Document
        .GetElementById("ctl00_main_LoginExpoPlanIt_LoginButton")
        .InvokeMember("Click");
}

Just tested this and it didn't work with "click" but did with "Click" :)

I'm using .net 4