public void delNoDWMC()

        {

            string[] files = Directory.GetFiles(@"D:\SFDA\InData\Bussiness", "*.xml");

            foreach (string dir in files)

            {

                System.Xml.Linq.XDocument doc = System.Xml.Linq.XDocument.Load(dir);

                foreach (var employee in doc.Document.Descendants("DataField").First().Descendants("Data"))

                {



                    string djbh = employee.Attribute("ToCorpID").Value;

                    if (djbh == "")

                    {

                        File.Delete(dir);

                    }

                }

            }

        }