.Net core controller tempdata add/remove

Implementing ExceptionFilterAttribute OnException method and need to redirect The old implementation (.Net 48) was

exceptionContext.Controller.TempData.Remove(""); 
exceptionContext.Controller.TempData.Add("");//exception message is added
exceptionContext.Controller.ControllerContext.HttpContext.Response.Redirect(url);

For the redirect I guess I can:

exceptionContext.HttpContext.Response.Redirect(url);//Is this correct?

Please suggest alternate for the remove and add?

In .net 6,there's no exceptionContext.Controller.TempData if you want to access TempData in your ExceptionFilter,you could try to inject the TempdataDictionaryFactory into the filter

For example, I tried as below:

public class MyExceptionFilter : ExceptionFilterAttribute
    {
        private readonly ITempDataDictionaryFactory _tempDataDictionaryFactory;




        public MyExceptionFilter(ITempDataDictionaryFactory tempDataDictionaryFactory)
        {
            _tempDataDictionaryFactory = tempDataDictionaryFactory;
        }



       public override void OnException(ExceptionContext context)
        {
            var tempData = _tempDataDictionaryFactory.GetTempData(context.HttpContext);
            tempData.Add("key", "value");
            
            context.Result = new RedirectToActionResult("Error", "Home", null);
        }
    }

in Program.cs:

builder.Services.AddControllersWithViews(x=>x.Filters.Add(typeof(MyExceptionFilter)));

The Result: