xml namespaces - C# XmlSerializer xmlns in child element matching parent -

i'm using xmlserializer create xml doc in use ebay's large merchant services.

<?xml version="1.0" encoding="utf-8" standalone="yes"?> <bulkdataexchangerequests xmlns="urn:ebay:apis:eblbasecomponents">     <header>         <siteid>0</siteid>         <version>775</version>     </header>     <addfixedpriceitemrequest xmlns="urn:ebay:apis:eblbasecomponents"> <version>775</version>  <item>     <autopay>false</autopay>     <buyerprotection>itemineligible</buyerprotection>     <buyitnowprice currencyid="usd">0.0</buyitnowprice>     <country>us</country>     <currency>usd</currency>     <description>test</description>     <gifticon>0</gifticon> </item> </addfixedpriceitemrequest> </bulkdataexchangerequests> 

the problem i'm having getting addfixedpriceitemrequest generated serializer contain xmlns bulkdataexchangerequests element has. seems requirement in order work. generate bulk tag using:

writer.writestartelement("bulkdataexchangerequests", "urn:ebay:apis:eblbasecomponents"); 

i create serializer.

serializer = new xmlserializer(typeof(addfixedpriceitemrequesttype));//, "urn:ebay:apis:eblbasecomponents"); 

and serialize namespace

request = new addfixedpriceitemrequesttype() { //populate data. };  xmlserializernamespaces namespaces = new xmlserializernamespaces(); namespaces.add("", "urn:ebay:apis:eblbasecomponents");  serializer.serialize(writer, request, namespaces); 

this type xml attributes:

[system.codedom.compiler.generatedcodeattribute("system.xml", "2.0.50727.5420")] [system.serializableattribute()] [system.diagnostics.debuggerstepthroughattribute()] [system.componentmodel.designercategoryattribute("code")] [system.xml.serialization.xmltypeattribute(namespace="urn:ebay:apis:eblbasecomponents",typename="addfixedpriceitemrequest")] public partial class addfixedpriceitemrequesttype : abstractrequesttype { //filled in class } 

my output ends this:

<addfixedpriceitemrequest xmlns="">    <errorlanguage xmlns="urn:ebay:apis:eblbasecomponents">en_us</errorlanguage>     <version xmlns="urn:ebay:apis:eblbasecomponents">837</version>     <item p4:type="item" xmlns:p4="http://www.w3.org/2001/xmlschema-instance" xmlns="urn:ebay:apis:eblbasecomponents"> 

could out how xmlns of addfixedpriceitemrequest set match bulk xmlns via serializer. or recommend way it. trying avoid writing each property out createelement/writeelement.

that works me

---

 itemtype itemtype = new itemtype()  {      //populate data.  };  apicall apicall = new additemcall() { item = itemtype };  additemrequesttype addfixedpriceitemrequesttype = ((additemcall)apicall).apirequest;  xmlserializernamespaces namespaces = new xmlserializernamespaces(new xmlqualifiedname[] {      new xmlqualifiedname(string.empty, "urn:ebay:apis:eblbasecomponents")});  xmlserializer xmlserializer = new xmlserializer(      addfixedpriceitemrequesttype.gettype(), "urn:ebay:apis:eblbasecomponents");  memorystream memorystream = new memorystream();  xmlserializer.serialize(memorystream, addfixedpriceitemrequesttype , namespaces);  memorystream.seek((long)0, seekorigin.begin);  xmldocument xmldocument = new xmldocument();  xmldocument.load(memorystream);  memorystream.close();  string additemrequesttypexml = xmldocument.outerxml; 

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the output going be:

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 <additemrequesttype xmlns="urn:ebay:apis:eblbasecomponents">   <item>     <applicationdata></applicationdata>     <autopay>false</autopay>     <categorymappingallowed>true</categorymappingallowed>     <country>us</country>     <currency>eur</currency>     <description>     ....   <additemrequesttype>