System.ArgumentException: Value cannot be null or empty.
Parameter name: contentType
at System.Web.Mvc.FileResult..ctor(String contentType)
at System.Web.Mvc.FileContentResult..ctor(Byte[] fileContents, String contentType)
at System.Web.Mvc.Controller.File(Byte[] fileContents, String contentType, String fileDownloadName)
at DesSite.Controllers.GalleryController.GetNewsPhoto(Int32 newsId, String who) in D:\Projects\Projects 2022\DesSite\DesSite\DesSite\Controllers\GalleryController.cs:line 85
