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 EiecSiteUser.Controllers.GalleryController.GetNewsPhoto(Int32 newsId, String who) in C:\Users\Lela.Papava\Source\Repos\EiecSiteUser 22.08.2025\EiecSiteUser\Controllers\GalleryController.cs:line 51
