.net - Testing DataContractSerializer with String -

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i'm testing sending complex message object on wcf service , getting various serialization errors. in order simplify things i'm trying cut down testing datacontractserializer, i've written following test based on code here:

dim message tlamessage = mockfactory.getmessage dim dcs datacontractserializer = new datacontractserializer(gettype(tlamessage)) dim xml string = string.empty  using stream new stringwriter(), writer xmlwriter = xmlwriter.create(stream)     dcs.writeobject(writer, message)     xml = stream.tostring end using  debug.print(xml)  dim newmessage tlamessage dim sr new stringreader(xml) dim reader xmlreader = xmlreader.create(sr) dcs = new datacontractserializer(gettype(tlamessage)) newmessage = ctype(dcs.readobject(reader, true), tlamessage) 'error here reader.close() sr.close()  assert.istrue(newmessage isnot nothing)

however gets unusual error in on call readobject: unexpected end of file while parsing name has occurred. line 1, position 6144

it appears buffering error can't see how 'readtoend' on string. i've tried using memorystream: dim ms new memorystream(encoding.utf8.getbytes(xml)) , streamwriter each of has come own errors or not compatible readobject method of datacontractserializer takes variety of different overloads.

note adapting code msdn page works fine requires serializing file, wanted serialize , string think i'm missing vital.

am missing obvious in code above?

the data xmlwriter not populated underlying stringwriter. should flush writer after writing:

dcs.writeobject(writer, message) writer.flush() xml = stream.tostring()

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