Lambda表达式和linq普通语法的一些对比

linq普通语法

return

(from p in dc.TeacherBasicInformation where p.TeacherNum == num select p.PhotoSrc).FirstOrDefault();
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Lambda表达式

return

dc.TeacherBasicInformation.Where(p => p.TeacherNum == num).Select(p => p.PhotoSrc).FirstOrDefault();