Linq 将两个查询结果合称为一个

       var handsonitems = from a in db.DltQuestionHandson
                                join c in db.DltBdChapter
                                on new { a.ChapterCode } equals new { c.ChapterCode }
                                select new
                                {
                                    a.PlantCode,
                                    c.ChapterCode,
                                    c.ChapterKnowledge,
                                    a.OrgSkillId,
                                    c.SkillCode
                                };
             var Jobevalitems = from a in db.DltQuestionJobeval
                                join c in db.DltBdChapter
                                on new { a.ChapterCode } equals new { c.ChapterCode }
                                select new
                                {
                                    a.PlantCode,
                                    c.ChapterCode,
                                    c.ChapterKnowledge,
                                    a.OrgSkillId,
                                    c.SkillCode
                                };
             var items = handsonitems.Union(Jobevalitems);