Too many redirects error in MVC application

Question

I am getting Too many redirects error in my MVC application.

 

After i add UserFilter : ActionFilterAttribute how can i solve this problem ?

public class UserFilter : ActionFilterAttribute
{
public override void OnActionExecuting(ActionExecutingContext context)
{
int? userid = context.HttpContext.Session.GetInt32("id");
if (!userid.HasValue)
{
context.Result = new RedirectToRouteResult(
new RouteValueDictionary
{
{"action","Index"},
{"controller","Admin"}
}
);
}
}
}