public static void Create(string ModelXML, string outFile)
{
XElement doc = XElement.Load(ModelXML);
XNamespace ns = doc.GetDefaultNamespace();
var ItemModel = (from item in doc.Descendants(ns + "TcTypeConstantAttach")
join IM in doc.Descendants(ns + "TcTypeConstantAttach") on item.Attribute("typeName").Value equals IM.Attribute("typeName").Value
join IRM in doc.Descendants(ns + "TcTypeConstantAttach") on item.Attribute("value").Value equals IRM.Attribute("typeName").Value
where item.Attribute("constantName").Value == "ItemRevision" && IM.Attribute("constantName").Value == "MasterForm" && IRM.Attribute("constantName").Value == "MasterForm"
select new { Item = item.Attribute("typeName").Value, ItemRevision = item.Attribute("value").Value, IM = IM.Attribute("value").Value, IRM = IRM.Attribute("value").Value }).OrderBy(x => x.Item);
string[] PrintModel = ItemModel.Select(x => String.Join(",", new Object[] { x.Item, x.ItemRevision, x.IM, x.IRM })).ToArray();
File.WriteAllLines(outFile, PrintModel);
}