当前看起来像这样：

Question

<?xml version="1.0" encoding="utf-8"?>
<soap12:Envelope xmlns:soap12="http://www.w3.org/2003/05/soap-envelope">
  <soap12:Body>
    <Profile xmlns="http://google.com">
      <number>123</number>
      <name>bob</name>
    </Profile>
  </soap12:Body>
</soap12:Envelope>

到目前为止，我的代码是：

            using (XmlWriter writer = XmlWriter.Create(@"C:\Users\Default\Desktop\books.xml"))
            {
                writer.WriteStartElement("soap12", "Envelope", "http://www.w3.org/2001/XMLSchema-instance");
                writer.WriteStartElement("soap12", "Body", null);
                writer.WriteStartElement("Profile", "http://google.com");

                writer.WriteElementString("number", "123");
                writer.WriteElementString("name", "bob");

            }
有人可以帮我这个吗？ 

谢谢！ 
我需要以编程方式创建一个看起来像这样的xml：