If you are experiening this error “The Security validation for this page is invalid.Click back in your web browser, refresh the page, and try your operation again” , even though you have impersonate user as System Account. No problem, you got to tell the web application that you will be doing some impersonate tricks inside your code. To do this go to the Central Administration site–> Under … Continue reading The Security validation for this page is invalid.Click back in your web browser, refresh the page, and try your operation again