c# - UriFormatException was unhandled -

i have xml document returned web service transforming xml document using xsl schema. getting error 'uriformatexception unhandled. invalid uri: uri string long.' able required xml document if save samplereportxml in temp folder , read it. appreciated. thanks.

       stringbuilder sb = new stringbuilder();        xmldocument doc = new xmldocument();        string inputxml =     @"c:\temp\samplereport.xml";          string transformxsl = @"c:\temp\transformschema.xsl";            xslcompiledtransform xslt = new xslcompiledtransform();        stringwriter writer = new stringwriter();        xslt.load(transformxsl);          xmlwritersettings settings = new xmlwritersettings();         settings.indent = false;         xmlwriter swriter = xmlwriter.create(sb, settings);         xslt.transform(inputxml, null, swriter);         sb.append(writer.tostring());         writer.close();         sb.replace("<?xml version=\"1.0\" encoding=\"utf-16\"?>", "");         textreader textreader = new stringreader(sb.tostring());         doc.load(textreader);         return doc;          xmldocument samplereportxml = new xmldocument();        samplereportxml = ws.getreport(100);  //passing parameter value report xml doc web service        string inputxml = samplereportxml.innerxml.tostring();        string transformxsl = @"c:\temp\transformschema.xsl";          xslcompiledtransform xslt = new xslcompiledtransform();        stringwriter writer = new stringwriter();        xslt.load(transformxsl);          xmlwritersettings settings = new xmlwritersettings();         settings.indent = false;         xmlwriter swriter = xmlwriter.create(sb, settings);         xslt.transform(inputxml, null, swriter); //getting error here         sb.append(writer.tostring());         writer.close();         sb.replace("<?xml version=\"1.0\" encoding=\"utf-16\"?>", "");         textreader textreader = new stringreader(sb.tostring());         doc.load(textreader);         return doc; 

i think want pass samplereportxml first argument transform method. serializing document string , pass in string method expects uri.