asp .net core实现连表查询

var userinfo=_uploadArticles.Table.Where(x=>x.Examine==false).Join(_appusrinfo.Table,x=>x.UserinfoId,y=>y.AppUserId,(x,y)=>new{x.Articlecontent,x.Articletitle,x.Articletype,

          x.CreatedAt,y.Alias,y.Username