.net中除去IList中的多余项

IList<ActionInfo> tempList = new List<ActionInfo>();
 IList<ActionInfo> tempActionList = new List<ActionInfo>();

  var iactionlist = (from li in tempList
                               select li).Distinct();
            foreach (var d in iactionlist)
            {
                tempActionList.Add(d);
            } 

tempList  为首次取出的值，tempActionList  为过滤后存入的值