APP 1、左连接：var LeftJoin = from t1 in l1join t2 in l2on t1.ID equals t2.ID into Joinedt12from t3 in Joinedt12.DefaultIfEmpty()select new {Name = t1.Name,Age=t2.Age }; 2、右连接：var RightJoin = from t2 in l2join ......
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1、左连接：var LeftJoin = from t1 in l1join t2 in l2on t1.ID equals t2.ID into Joinedt12from t3 in Joinedt12.DefaultIfEmpty()select new {Name = t1.Name,Age=t2.Age }; 2、右连接：var RightJoin = from t2 in l2join ......
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