public BaseController()
{
ViewData["FechaSistema"] = FechaSistema.ToString("dd/MM/yyyy", CultureInfo.InvariantCulture);
System.Web.HttpContext.Current.Response.Cache.SetExpires(DateTime.UtcNow.AddDays(-1));
System.Web.HttpContext.Current.Response.Cache.SetValidUntilExpires(false);
System.Web.HttpContext.Current.Response.Cache.SetRevalidation(HttpCacheRevalidation.AllCaches);
System.Web.HttpContext.Current.Response.Cache.SetCacheability(HttpCacheability.NoCache);
System.Web.HttpContext.Current.Response.Cache.SetNoStore();
}
