xslt - Converter for Normal XML to QTIv2.0 compliant XML or any advice on how

Question

I am looking for converting normal xml from a LMS Quiz with multiple choice questions to QTIv2.0 compliant XML. I have searched the web through and see XSLT is a possible option.having just started learning coding 5 months ago am looking for some help or guidance on how to go about the conversion.

I proposed XSLT and it is not accepted.I am writing a dot net code to transform an XML file.

I've taken this sample as a basis.

private static string XmlParamsWriterForLogin(string headerId, string courseType, string scheduleID, string courseId, string nric, string attendance, string result, string score) { using (var sw = new StringWriter()) { using (var xw = XmlWriter.Create(sw)) { xw.WriteStartDocument();

                // start dataInterface
                xw.WriteStartElement("dataInterface");

                // start header
                xw.WriteStartElement("header");

                xw.WriteElementString("id", headerId);

                xw.WriteElementString("from", "LMS");

                xw.WriteElementString("to", "FMS");

                xw.WriteElementString("interfaceType", "LMS_FMS_STORE_CLASS_RESULT");

                xw.WriteElementString("sentTime", DateTime.Now.ToString("dd/MM/yyyy HH:mm:ss"));

                xw.WriteElementString("numOfEntries", "1");

                xw.WriteElementString("deliveryMode", "Synchronously");

                xw.WriteElementString("concurrency", "False");

                // end header
                xw.WriteEndElement();

                // start content
                xw.WriteStartElement("content");

                // start contentItem
                xw.WriteStartElement("contentItem");

                xw.WriteStartElement("field");
                xw.WriteElementString("fieldName", "courseType");
                xw.WriteElementString("fieldValue", courseType);
                xw.WriteEndElement();

                xw.WriteStartElement("field");
                xw.WriteElementString("fieldName", "scheduleID");
                xw.WriteElementString("fieldValue", scheduleID);
                xw.WriteEndElement();

                xw.WriteStartElement("field");
                xw.WriteElementString("fieldName", "courseID");
                xw.WriteElementString("fieldValue", courseId);
                xw.WriteEndElement();

                xw.WriteStartElement("field");
                xw.WriteElementString("fieldName", "nric");
                xw.WriteElementString("fieldValue", nric);
                xw.WriteEndElement();

                xw.WriteStartElement("field");
                xw.WriteElementString("fieldName", "attendance");
                xw.WriteElementString("fieldValue", attendance);
                xw.WriteEndElement();

                xw.WriteStartElement("field");
                xw.WriteElementString("fieldName", "result");
                xw.WriteElementString("fieldValue", result);
                xw.WriteEndElement();

                xw.WriteStartElement("field");
                xw.WriteElementString("fieldName", "score");
                xw.WriteElementString("fieldValue", score);
                xw.WriteEndElement();

                // end contentItem
                xw.WriteEndElement();

                // for error
                xw.WriteStartElement("contentItem");
                xw.WriteEndElement();

                // end content
                xw.WriteEndElement();

                // end dataInterface
                xw.WriteEndElement();
                xw.WriteEndDocument();
            }

            return sw.ToString();
        }
    }

I still dont see how it is going to work though.