C#对DataTable中的某列进行分组

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IEnumerable<IGrouping<string, DataRow>> result = dt.Rows.Cast<DataRow>().GroupBy<DataRow, string>(dr => dr["FORMSERIALNUMBER"].ToString());//C# 对DataTable中的某列分组，result中的Key是分组后的值                 foreach (IGrouping<string, DataRow> ig in result)                 {                                    var tmpEmailString = "";                     foreach (DataRow dr in ig)                     {                        string tmpstr = dr[0].ToString() ;                                           }                                    }