1.单个属性去重筛选
//去重筛选 var ChgDtlVoList = datas.Where((x, i) => datas.FindIndex(z => z.ChgId == x.ChgId ) == i).ToList()
2.多个属性筛选去重（三个属性）
//去重筛选 var ChgDtlVoList = datas.Where((x, i) => datas.FindIndex(z => z.ChgId == x.ChgId ) == i).ToList().Where((x, i) => datas.FindIndex(z => z.OdStd == x.OdStd) == i).ToList().Where((x, i) => datas.FindIndex(z => z.BatNo == x.BatNo) == i).ToList();