public class TempImage : IDisposable
		{
			public string FileName { get; set; }
			public string ContentType { get; set; }
			public string TempPath { get; set; }

			private bool _isDisposed;

			public void Dispose()
			{
				if (_isDisposed)
					return;
				try
				{
					System.IO.File.Delete(TempPath);
					_isDisposed = true;
				}
				catch (Exception ex)
				{
					Log.DebugException(ex.Message, ex);
				}
			}

			~TempImage()
			{
				Dispose();
			}
		}

		private const string TempFolder = "~/App_Data/tmp/";

		public ActionResult Image(string id)
		{
			var temp = Session[id] as TempImage;
			if (temp == null || !System.IO.File.Exists(temp.Path))
				return HttpNotFound();
			return File(temp.Path, temp.ContentType);
		}

		[HttpPost]
		public ActionResult Upload()
		{
			if (Request.Files.Count > 0 && Request.Files[0] != null && Request.Files[0].ContentLength > 0)
			{
				var upload = Request.Files[0];
				var temp = new TempImage
					{
						FileName = upload.FileName,
						ContentType = upload.ContentType
					};
				var token = Guid.NewGuid().ToString("N");
				temp.TempPath = Server.MapPath(TempFolder + token + System.IO.Path.GetExtension(upload.FileName));
				upload.SaveAs(temp.TempPath);
				Session[token] = temp;
				return Json(new
					{
						status = "Ok",
						image = Url.Action("Image", new { id = token }),
						token
					});
			}
			return Json(new
				{
					status = "Error"
				});
		}

 ~Resource() 
    {
        // Finalizer calls Dispose(false)
        Dispose(false);
    }