C# List根据某一字段排序 将字段相同的排序到一起

            List<JZJLXQ_Prescription_Item> ciList = new List<JZJLXQ_Prescription_Item>();
            List<JZJLXQ_Prescription_Item> tempItemList = new List<JZJLXQ_Prescription_Item>();
            if (cfxxModel != null && cfxxModel.content != null && cfxxModel.content.prescriptionItems != null)
            {
                foreach (JZJLXQ_Prescription_Item reply in cfxxModel.content.prescriptionItems.list.item)
                {
                    ciList.Add(reply);
                    tempItemList.Add(reply);
                }
            }
            List<JZJLXQ_Prescription_Item> cfItemList = new List<JZJLXQ_Prescription_Item>();
            foreach (JZJLXQ_Prescription_Item cfItem in ciList)
            {
                for (int i = ; i < tempItemList.Count; i++)
                {
                    JZJLXQ_Prescription_Item itemTemp = (JZJLXQ_Prescription_Item)tempItemList[i];
                    if (cfItem.YPZH.Equals(itemTemp.YPZH))
                    {
                        cfItemList.Add(itemTemp);
                        tempItemList.RemoveAt(i);
                        i--;
                    }
                }
            }
           cfItemList 为最终排序结果