معادل کد زیر در mvc.core چیست

items.InputStream.Read(Attach.Attached, 0, items.ContentLength);

foreach (var items in file)
						{
							var Attach = new Add
							{
								DocumentationAttachId = Guid.NewGuid(),
								DocumentationId = newGuId,
								FileName = items.FileName,
								ContentType = items.ContentType,
								FileLength = items.ContentLength,
								Attached = new byte[items.ContentLength],
							};
							items.InputStream.Read(Attach.Attached, 0, items.ContentLength);
							db.AttachRepository.Add(AttachMapper.Attach(Attach));
							db.Complete();
						}