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StringBuilder sb = new
StringBuilder(); List<IGrouping<string, modle>> listRepeat = modelList.GroupBy(l => l.IDCode).Where(g => g.Count() > 1).ToList(); if
(listRepeat.Count() > 0) { foreach
(IGrouping<string, modle> data in
listRepeat) sb.AppendFormat("您输入了相同的身份证号/组织机构代码\\\"{0}\\\"！\\r\\n", data.Key); } |
Linq使用GroupBy筛选数据,布布扣,bubuko.com
原文：http://www.cnblogs.com/dashi/p/3680503.html