XML Declaration

I use the following code to create an XML file which generates declaration as follows:

<?xml version="1.0" encoding="utf-8"?>
<!--This file is an example of the object for Performance Enhancement. -->
<Jobs xmlns:xsi="http://ift.tt/Atvu06; xmlns:xsd="http://ift.tt/FPH52k;
       <Job>

            XmlSerializer x = new XmlSerializer(jobs.GetType(), new XmlRootAttribute("Jobs"));
            string filename = @"C:\test.xml";

            XmlWriterSettings settings = new XmlWriterSettings();
            settings.Indent = true;
            settings.IndentChars = "       ";
            settings.NewLineChars = "\r\n";
            settings.NewLineHandling = NewLineHandling.Replace;

            using (XmlWriter xmlWriter = XmlWriter.Create(filename, settings))
            {
                xmlWriter.WriteComment("This is my comment ");
                x.Serialize(xmlWriter, jobs);
                xmlWriter.Close();
            }

How do I modify code to generate declaration like the following:

<?xml version="1.0" encoding="utf-8"?>
<Jobs xmlns:xsi="http://ift.tt/Atvu06; xmlns="     http://ift.tt/1v2naCi; xsi:schemaLocation="        http://ift.tt/1zy9M0t  ../xsd_schemas/obj_Job.xsd">
  <!--This is my comment -->
  <Job id="A1" id="A2" id="A3">