XML : Using LINQ to output SQL data from two tables into XML

i am very new to this. Hope someone could help me suggest how to improve the code.

I have two tables where i need to get the SQL data and ouput it into XML format. I am using LINQ method. Below how the code looks like.

      #region Database XML Methods    private static void CreateDatabaseXml(string path)  {      tbchrDataContext db = new tbchrDataContext();      XDocument doc = new XDocument(          // XML Declaration          new XDeclaration("1.0", "utf-8", "yes"),          // XML Root element to 3rd in nest          new XElement(ns + "WMS",          new XElement(ns + "Order",          new XElement(ns + "Header", from a in db.T_ORDER_DETAILs                                      select new XElement(ns + "RARefNum", a.RARefNum),                                       new XElement (ns + "WMSCategory", from b in db.T_ORDER_HEADERs select b.Customer),                                      new XElement (ns + "CustomerID", from a in db.T_ORDER_DETAILs select a.SupplierName)))) );