How to sign out from authentication in asp. Net

https://www.aspsnippets.com/Articles/FormsAuthenticationSignOut-in-ASPNet-MVC.aspx

https://www.aspsnippets.com/Articles/FormsAuthenticationSignOut-in-ASPNet-MVC.aspx

If you are talking about webforms

FormsAuthentication.SignOut();

If the above doesn't work then use below code

FormsAuthentication.SignOut();
Session.Abandon();
HttpCookie cookie = new HttpCookie(FormsAuthentication.FormsCookieName, "");
cookie.Expires = DateTime.Now.AddYears(-1);
Response.Cookies.Add(cookie);