public ActionResult Tupload(){

            return View();
        }



        [HttpPost]
        [ValidateAntiForgeryToken]
        //public JsonResult DoUpload([FromForm] Object obj, [FromForm] IFormFile file) { <-- Model bound complex types must not be abstract or value types and must have a parameterless constructor.
        //public async Task<IActionResult> Post(List<IFormFile> files) <- files is always empty
        //public JsonResult DoUpload(IFormFile files) { <- Model bound complex types must not be abstract or value types and must have a parameterless constructor.
        //public JsonResult DoUpload(UploadedDocument files) { <- attachment attribute, which is IFormFile is null
        //public JsonResult DoUpload ( [FromBody] UploadedDocument files) { <- 415 Unsupported Media Type
        //public JsonResult DoUpload ( [FromForm] UploadedDocument files) { <- {"attachment":null}
        //public JsonResult DoUpload (UploadedDocument file, IFormFile doc) { <- Model bound complex types must not be abstract or value types and must have a parameterless constructor.
        //public JsonResult DoUpload (List<IFormFile> files ) { <- files is null
        //public JsonResult DoUpload (Object files) { <- returns {} when (attempting to return Json(files))
        public JsonResult DoUpload (List<IFormFile> files) {

            return Json(files.Count);

            //return Json(new { filename = files.Name, size = files.Length } );

            /*
            long size = files.Sum(f => f.Length);

            // full path to file in temp location
            var filePath = Path.GetTempF    ileName();

            foreach (var formFile in files)
            {
                if (formFile.Length > 0)
                {
                    using (var stream = new FileStream(filePath, FileMode.Create))
                    {
                        await formFile.CopyToAsync(stream);
                    }
                }
            }

            // process uploaded files
            // Don't rely on or trust the FileName property without validation.

            return Json(new { count = files.Count, size, filePath});
            */
            //return Json(Request.Form);
        }