c# - WCF Rest XML EndPoint.(HTTPPOST). Deserialise an external object -

i have service contract supposed accept widget input parameter. widget spec given me third party using contract. made appropriate data contracts , can use unit test (which using wcf service reference) serialize widget , http post.

it bare bones xml serialization embedded in body of httppost. not formed xml document. e.g.

 stringwriter sw = new stringwriter();         xmltextwriter xtw = new xmltextwriter(sw);         xtw.writestartelement("widget");         xtw.writeelementstring("datetime", widget.datetime);         xtw.writestartelement("status");         foreach (myservref.status status in widget.status)         {             xtw.writestartelement("status");             xtw.writeelementstring("bay", status.bay.tostring());             xtw.writeelementstring("currentstate", status.currentstate.tostring());             xtw.writeelementstring("sector", status.sector.tostring());             xtw.writeelementstring("spaceid", status.spaceid.tostring());             xtw.writeelementstring("statusid", status.statusid.tostring());             xtw.writeelementstring("transitiondatetime", status.transitiondatetime);             xtw.writeendelement();         }         xtw.writeendelement();         xtw.writeelementstring("uniqueid", message.uniqueid.tostring());         xtw.writeendelement();         xtw.close();          string xml = sw.tostring(); 

when third party tries use contract there error 400. using formatted xml doc has namespace declarations in it. e.g.

    <widget xmlns:xsi="http://www.w3.org/2001/xmlschema-instance" xmlns:xsd="http://www.w3.org/2001/xmlschema"     uniqueid="8cf4df0f-e765-4afc-b6fa-cd90b07b67b2"     datetime="2015-08-02t01:00:29.2213364z" xmlns="http://www.thesite.com/">       <status>         <spaceid>00010003</spaceid>         <statusid>1658038</statusid>            </status>     </widget> 

the contract is:

 [operationcontract]//don't decorate xml rest contracts use   web.config            response mycontract(widget widget); 

the data contract is;

[datacontract(namespace = "")] public class widget {       private string _uniqueidfield;      private string _datetimefield;        [datamember]      public status[] status     {         get;         set;      }      [datamember]     public string uniqueid     {         { return _uniqueidfield; }         set { _uniqueidfield = value; }     }      [datamember]     public string datetime     {         { return _datetimefield; }         set { _datetimefield = value; }     } } 

i have tried many options including alternate contract takes string parameter , used datacontractserializer deserialize widget.

essentially haven't clue how , floundering around looking correct way. appreciate can me solve this. thanks

if can make .net winform app , reference service work? if works should able wireshark requests see difference between winform app , third party's request.