LINQ nested queries

Direct code:

Get the chapter and article ilist<chapter> chapters = EntAppFrameWorkContext.DomainModelService.ExtenedSer Vice<iebookmanage> (). Searchchapterandpartbyebookid (ebook.            Key); Dictionary<chapter,ilist<keytochasec>> dictionary=new Dictionary<chapter, IList<KeyToChaSec>            > (); Get the available Knowledge Point directory relationship based on chapter and article foreach (Var chapter in chapters) {ilist<keytochasec> Keyt                        Ochasecs = entappframeworkcontext.domainmodelservice.extenedservice<iebookmanage> () . Searchallvalidkeytochasecbychapterorpart (chapter.                Key); Dictionary.            ADD (CHAPTER,KEYTOCHASECS);                            } var jsons = from dic in dictionary select new { Chapterid=dic. Key.key, Chaptername=dic.                  Key.name, knowledgepoints= (          From Keytochasec in DIC. Value Select New {ID = KEYTOCHASEC.K Eypoint.key, Knowledgepointref = @ "xhtml/" + keytochasec . ChpSect.PositionPage.Key + ". Xhtml#kp" + keyToChaSec.KeyPoint.Key, Chaptername = Keytochase C.chpsect.name, Chapterid = KeyToChaSec.ChpSect.Key, knowled Gepoint = KeyToChaSec.KeyPoint.Name})};

　　

LINQ nested queries