这就是问题所在，我知道为什么我也被它欺骗了，因为我试图让事情超出循环，但不完全是你做的方式。;-)

太棒了！谢谢！

That's what the problem was and I know why I got tricked by it too since I have tried to have things outside the loop, but not exactly the way you did it. ;-)
Great! Thanks!

<pre>List<string> list = new List<string>();
foreach (var ProjNrList in Activity)
{
   list.Add(ProjNrList.Element("ProjectNr").Value);
}
ViewBag.ProjNrList = list;
return View();