Linq实现左连接、右连接
--一本错误的记录 insert into Book values('错误时怎样练成的',111) --左连接 select s.name,b.name from student as s left join Book as b on s.id ...
原文：linq实现左连接
左连接： var LeftJoin from emp in ListOfEmployees join dept in ListOfDepartment on emp.DeptID equals dept.ID into JoinedEmpDept from dept in JoinedEmpDept.DefaultIfEmpty select new EmployeeName emp.Name, ...
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