Why don't HttpPostedFileBase file and Request.File exist? How to upload a file in C#?

Question

C++ / C#

How to upload a file to Aps Net Core server?
I'm trying as they say, but HttpPostedFileBase file and Request.File don't exist?
What needs to be connected to receive files?

[HttpPost]
public ActionResult Index(IEnumerable<HttpPostedFileBase> files) {
  foreach (var file in files) {
    if (file.ContentLength > 0) {
      var fileName = Path.GetFileName(file.FileName);
      var path = Path.Combine(Server.MapPath("~/App_Data/uploads"), fileName);
      file.SaveAs(path);
    }
  }
  return RedirectToAction("Index");
}

and in general Request.Files does not exist ... that is, it does not see Files

Answer 1

In .Net Core - IFormFile and IFormFileCollection
Example here