how modify streamreader an xmlreader vigilant .net 2.0/c#

here's discerning doubt i've banging conduct opposing today.

i'm perplexing modify .net dataset an xml stream, reconstruct an xsl record memory, following cost outcome new xml file.

here's tide solution:

        twine transformxml = @"pathtoxsldocument";

        xmldocument originalxml = new xmldocument();

        xmldocument transformedxml = new xmldocument();

        xslcompiledtransform transformer = new xslcompiledtransform();

        dataset ds = new dataset();

        twine filepath;

        originalxml.loadxml(ds.getxml()); //data hallowed prior

        stringbuilder sb = new stringbuilder();

        xmlwriter author = xmlwriter.create(sb);

        transformer.load(transformxml);

        transformer.transform(originalxml, writer); //no need name node

        transformedxml.loadxml(sb.tostring());

        transformedxml.save(filepath);

        writer.close();

here's uncanny code:

bufferedstream tide = new bufferedstream(new memorystream());

dataset ds = new dataset();

da.fill(ds);

ds.writexml(stream);

streamreader sr = new streamreader(stream, true);

stream.position = 0; //i'm certain necessary, nonetheless streamreader review calm position contingency reset.

xmlreader reader = xmlreader.create(sr, null);  //problem combined here, xmlreader combined zero information streamreader

xslcompiledtransform transformer = new xslcompiledtransform();

transformer.load(@"<path xsl file>");

transformer.transform(reader, null, writer); //exception thrown here, nonetheless problem originates xmlreader.create(sr, null)

for reason transformer.transform method, reader bottom node, fact reader isn't reading anything streamreader.

my questions wrong code? secondarily, there improved proceed convert/transform/store dataset xml?

edit: both answers useful technically aku's closer. however i am arrangement towards fortitude some-more closely resembles longhorn's after perplexing both solutions.