https://learn.microsoft.com/en-us/dotnet/api/microsoft.aspnetcore.mvc.razorpages.pagemodel.tempdata?view=aspnetcore-10.0
PageModel.TempData Property (Microsoft.AspNetCore.Mvc.RazorPages) | Microsoft Learn
Gets or sets ITempDataDictionary used by PageResult.
propertymicrosoftaspnetcoremvclearn