Failed to add account due to the logout button was changed and failed to logout

[mystasly48]

Currently, the program will logout after logged in.
The code that the bug is caused is

if (webBrowser1.Url.OriginalString == AuthUrl1 || webBrowser1.Url.OriginalString == AuthUrl2) {
  var r = new Regex(@"<CODE>(\d+)</CODE>");
  var m = r.Match(webBrowser1.DocumentText);
  if (m != null) {
    PIN = m.Result("${1}");
    Success = true;
  }
  authorizingLabel.Visible = true;
  webBrowser1.Visible = false;
  webBrowser1.Navigate(LogoutUrl);
} else if (webBrowser1.Url.OriginalString == LogoutUrl) {
  // logout
  var logout = webBrowser1.Document.GetElementsByTagName("button").OfType<HtmlElement>()
  .Where(x => x.OuterHtml.Contains("js-logout-button")).FirstOrDefault();
  logout.InvokeMember("click");
.....

Specifically,

  webBrowser1.Navigate(LogoutUrl);
} else if (webBrowser1.Url.OriginalString == LogoutUrl) {
  // logout
  var logout = webBrowser1.Document.GetElementsByTagName("button").OfType<HtmlElement>()
  .Where(x => x.OuterHtml.Contains("js-logout-button")).FirstOrDefault();
  logout.InvokeMember("click");

The button's class names were changed and logout.InvokeMember('click") is failed.

We can fix the bug by changing the name to specify the button actually.
But Twitter may change the name again in the future, and the bug will be happened again.
We need to find out a solution that can be used permanently.