var aa = ltB.FindAll(b => ltA.Any(a => a.PolicyNo == b.ID));//得出不同var expectedList = ltB.Except(aa).ToList();
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var aa = ltB.FindAll(b => ltA.Any(a => a.PolicyNo == b.ID));//得出不同var expectedList = ltB.Except(aa).ToList();
转载于:https://www.cnblogs.com/XuPengLB/p/7521830.html