使用多级联接Linq创建多级XML

Question

我正在尝试使用Linq创建XML，但是我有多个表嵌套如上，所以我必须创建从Table1中选择的具有明确ID的元素，依此类推，那么如何创建多个连接如上图？或者我应该如上所述迭代地重复和增加连接？

XDocument xDocument = new XDocument(new XElement("Table1",
            from cs in Table1
            join c in Table2
                on cs.table1_id equals c.fk_table1_id
            join ml in Table3
                on c.table2_id equals ml.fk_table2_id
            join s in Table4
                on ml.table3_id equals s.fk_table3_id
            select new XElement("Table2",
                new XAttribute("NAME", c.name),
                new XAttribute("TYPE", c.type),
                new XAttribute("ID", c.id)),

                //stucked here

                new XElement("Table3",
                select new XElement("Table3",
                        new XAttribute("WIDTH", ml.height),
                        new XAttribute("HEIGHT", ml.width)),