http://security.stackexchange.com/questions/2120/when-the-use-of-a-antiforgerytoken-is-not-required-needed http://benohead.com/asp-net-mvc-the-required-anti-forgery-form-field-__requestverificationtoken-is-not-present/ http://stackoverflow.com/questions/19933115/mvc4-postback-on-dropdownlist-change