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Object to xml and write in text file using C# code

 public static void ObjectToXml(object obj, string path_to_xml)
        {
            //serialize and persist it to it's file
            try
            {

                 System.Xml.Serialization.XmlSerializer writer =
                new System.Xml.Serialization.XmlSerializer(obj.GetType());
                System.IO.StreamWriter file =
                new System.IO.StreamWriter(path_to_xml);

                 writer.Serialize(file, obj);
                file.Close();
                //XmlSerializer ser = new XmlSerializer(obj.GetType());
                //FileStream fs = File.Open(
                // path_to_xml,
                // FileMode.OpenOrCreate,
                // FileAccess.Write,
                // FileShare.ReadWrite);
                //ser.Serialize(fs, obj);
            }
            catch (Exception ex)
            {
                throw new Exception(
                "Could Not Serialize object to " + path_to_xml,
                ex);
            }
        }
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