WCF, Serialize Json to XML - json

Question

Using DataContractJsonSerializer, I was able to get Json string.
Now, I want to convert this Json(named 'stream') to XML.
Is there any way without using "[WebInvoke(ResponseFormat = WebMessageFormat.Xml, BodyStyle = WebMessageBodyStyle.Wrapped)]"?
IService
[OperationContract]
string JsonSerializeFromDatabase();
[OperationContract]
string XmlSerializeFromJson(string strJson);
ClientSide
WCFService.Service1Client client = new WCFService.Service1Client();
string stream = client.JsonSerializeFromDatabase();
string stream2 = client.XmlSerializeFromJson(stream);
div1.InnerText = stream2;
ServerSide that I currently have (but no luck)
public string XmlSerializeFromJson(string strJson)
{
Stream stream1 = new FileStream("temp.xml", FileMode.Create);
XmlWriter xmlWriter = XmlWriter.Create(stream1);
XmlSerializerser = new XmlSerializer(typeof(string));
ser.Serialize(xmlWriter, strJson);
stream1.Position = 0;
StreamReader sr = new StreamReader(stream1);
string strXml = sr.ReadToEnd();
stream1.Dispose();
stream1.Close();
return strXml;
}

Answer 1

You need to first deserialize your json string into an instance of a type, and then create the serializer specifically to serialize the instance of the type to xml.
Something like:
var myInstance = new JavaScriptSerializer().Deserialize<InstanceType>(strJson);
var ser = new XmlSerializer(typeof(InstanceType));
ser.Serialize(xmlWriter, myInstance);