public void LoginToBackoffice()
{
if (_requestHandler.Cookies.Count != 0)
{
return;
}
_viewState.Backoffice.LoginUrl = FindBackofficeLoginUrl();
var loginData = string.Format("j_username={0}&j_password={1}&submit=", _viewState.Backoffice.UserName, _viewState.Backoffice.Password);
var loginUrl = string.Format("{0}/j_spring_security_check", _viewState.Backoffice.LoginUrl);
_requestHandler.ExecutePost(loginUrl, loginData, true);
}