1： 过滤所有的工作集

FilteredWorksetCollector col = new FilteredWorksetCollector(doc);            _AllWorksetList = col.Where(p => p.Kind == WorksetKind.UserWorkset).OrderBy(p => p.Name).ToList();            foreach (Workset ws in _AllWorksetList)            {                checkedListBox1.Items.Add(ws.Name);                _SumCount++;            }

　　2：过滤工作集中的所有元素

foreach(Workset ws in wsList)                {                    FilteredElementCollector col = new FilteredElementCollector(doc);                    ElementWorksetFilter fil = new ElementWorksetFilter(ws.Id);                    ICollection
     
       wsElements = col.WherePasses(fil).ToElements();                    eList.AddRange(wsElements);                }