How to temporarily disable bundling and minification at runtime?

Extending what I mentioned in a comment:

[AttributeUsage(AttributeTargets.Class | AttributeTargets.Method, AllowMultiple = false, Inherited = true)]public class OptimizationsDebuggingAttribute : ActionFilterAttribute{    private const String PARAM_NAME = "DisableOptimizations";    private const String COOKIE_NAME = "MySite.DisableOptimizations";    public override void OnActionExecuting(ActionExecutingContext filterContext)    {        Boolean parsedPref;        Boolean optimizationsDisabled = false;        if (filterContext.HttpContext.Request.QueryString[PARAM_NAME] != null)        { // incoming change request            var pref = filterContext.HttpContext.Request.QueryString[PARAM_NAME].ToString();            if (Boolean.TryParse(pref, out parsedPref))            {                optimizationsDisabled = parsedPref;            }        }        else        { // use existing settings            var cookie = filterContext.HttpContext.Request.Cookies[COOKIE_NAME];            if (cookie != null && Boolean.TryParse(cookie.Value, out parsedPref))            {                optimizationsDisabled = parsedPref;            }        }        // make the change        System.Web.Optimization.BundleTable.EnableOptimizations = !optimizationsDisabled;        // save for future requests        HttpCookie savedPref = new HttpCookie(COOKIE_NAME, optimizationsDisabled.ToString())        {            Expires = DateTime.Now.AddDays(1)        };        filterContext.HttpContext.Response.SetCookie(savedPref);        base.OnActionExecuting(filterContext);    }}

then of course implementing it looks something like:

public static void RegisterGlobalFilters(GlobalFilterCollection filters){    filters.Add(new HandleErrorAttribute());    filters.Add(new OptimizationsDebuggingAttribute());}

Or, if you prefer the hands-on approach:

[OptimizationsDebugging]public ActionResult TroublesomeAction(){    return View();}