public virtual ActionResult PreviousIdea(string id)
{
if (IdeasList == null || IdeasList.Count == 0)
{
return(RedirectToAction(MVC.Voting.Details(id, null)));
}
var current = IdeasList.SingleOrDefault(i => i.Id == id);
var index = IdeasList.IndexOf(current) - 1;
if (index < 0)
{
index = IdeasList.Count - 1;
}
return(RedirectToAction(MVC.Idea.Details(IdeasList[index].Id, IdeasList[index].Subject.ToSeoUrl(), null)));
}