UserData property of FormsAuthenticationTicket is empty despite being set


For some reason, I the UserData property of my authentication cookie is empty. Here is the code:

var authCookie = FormsAuthentication.GetAuthCookie(userName, rememberUser.Checked);
// Get the FormsAuthenticationTicket out of the encrypted cookie
var ticket = FormsAuthentication.Decrypt(authCookie.Value);
// Create a new FormsAuthenticationTicket that includes our custom User Data
var newTicket = new FormsAuthenticationTicket(ticket.Version, ticket.Name, ticket.IssueDate, ticket.Expiration, ticket.IsPersistent, "userData");
// Update the authCookie's Value to use the encrypted version of newTicket
authCookie.Value = FormsAuthentication.Encrypt(newTicket);
// Manually add the authCookie to the Cookies collection
FormsAuthentication.RedirectFromLoginPage(userName, rememberUser.Checked);

Here is how I try to access it:

if (HttpContext.Current.Request.IsAuthenticated )
    var authCookie = HttpContext.Current.Request.Cookies[FormsAuthentication.FormsCookieName];
    if (authCookie != null)
        var authTicket = FormsAuthentication.Decrypt(authCookie.Value);
        string data = authTicket.UserData;
        // data is empty !!!

Best Solution

RedictFromLoginPage overwrites your cookie. Remove this line and redirect manually (Response.Redirect).