Generate an xml file with StringWriter(UTF-8) ??

Question

When I try to generate an xml file with StringWriter, I can’t change the encoding (UTF-16) to UTF-8. This application, having to have a format xml(utf-8) To preserve compatibility with other programs. Ex StringWriter s = new StringWriter(); XmlTextWriter tw = new XmlTextWriter(s,Encoding.UTF-8); Don’t work, I am receive a error message “C:\Inetpub\wwwroot\LicenceTools\site\GenerateXmlTreeView.aspx.cs(58): Argument '1': cannot convert from 'System.IO.StringWriter' to 'System.IO.Stream'” I would like having rather than Could you help me? Thanks in advance PS: It s a stream for WebServer. Application Code: Htm: <%@ Page language="c#" Codebehind="GenerateXmlTreeView.aspx.cs" AutoEventWireup="false" Inherits="LicenceTools.site.GenerateXmlTreeView" %> C#: using System; using System.Collections; using System.ComponentModel; using System.Data; using System.Drawing; using System.Web; using System.Web.SessionState; using System.Web.UI; using System.Web.UI.WebControls; using System.Web.UI.HtmlControls; using ZZDataFromDb.ZZConn; using ZZTools.ZZTools; using System.Xml; using System.IO; using System.Globalization; using System.Text; using System.Xml.XPath; namespace LicenceTools.site { ///

/// Summary description for GenerateXmlTreeView. ///

public class GenerateXmlTreeView : System.Web.UI.Page { private void Page_Load(object sender, System.EventArgs e) { //StringReader = new StreamReader("site/GenerateXmlTreeView.aspx"); string strSelect; // Put user code to initialize the page here if( Request.QueryString["select"] != null) { strSelect =Request.QueryString["select"]; }else { strSelect= ""; } string strIdCompany; if( Request.QueryString["IdCompany"] != null) { strIdCompany =Request.QueryString["IdCompany"]; } else { strIdCompany= "%"; } DataContainer dc=new DataContainer(); // create a data container for this function dc.Set("select", strSelect); // add the user name dc.Set("IdCompany", strIdCompany); // add the user name DBData dts=new DBData(dc); // create a interface to the DB technology DataTable DT; DT = dts.QueryMultiRow("sql_fillTreeView"); // query if the account exists. Always returns a value //Xml Generate ArrayContainer Level = new ArrayContainer(100); StringWriter s = new StringWriter(); //string test = s.Encoding.ToString(); XmlTextWriter tw = new XmlTextWriter(s);// ,Encoding.UTF8 tw.Formatting=Formatting.Indented; tw.WriteStartDocument(); tw.WriteStartElement("treeview"); tw.WriteAttributeString("title","Licenses Tool"); tw.WriteStartElement("custom-parameters"); tw.WriteStartElement("param"); tw.WriteAttributeString("name","shift-width"); tw.WriteAttributeString("value","15"); tw.WriteEndElement(); tw.WriteStartElement("param"); tw.WriteAttributeString("name","img-directory"); tw.WriteAttributeString("img-directory","images/"); tw.WriteEndElement(); tw.WriteEndElement(); int level=0; string IdElement; Level.add(""); string Name; string IdPrduit; string IdParent; string License; string PrevIdParent=""; string PrevIdElement=""; bool FlagElementFirst= true ; foreach(DataRow r in DT.Rows){ if (FlagElementFirst == true) { Level.Remove(0); Level.add(r["idParent"].ToString()); } IdElement = r["id"].ToString(); Name = r["Name"].ToString(); IdPrduit = r["IdPrduit"].ToString(); IdParent = r["idParent"].ToString(); License = r["license"].ToString(); if(( Level[IdParent]>=level ||level==0 )) { if((IdParent=="" || IdParent!=PrevIdParent ) && (IdPrduit=="") ) { Console.WriteLine("Name"); tw.WriteStartElement("folder"); tw.WriteAttributeString("title",Name); if (FlagElementFirst == true) { tw.WriteAttributeString("img","folder"); } else { tw.WriteAttributeString("img","folder"); } level++ ; Level.add(IdElement); PrevIdParent=IdParent; PrevIdElement =IdElement; } else if((IdParent==PrevIdParent)&& IdParent!="" && (IdPrduit=="") ) { } else if(IdPrduit!="") { string reg; if(License=="Y") {reg="true";} else {reg="false" ; } tw.WriteStartElement("leaf"); tw.WriteAttributeString("title",Name); tw.WriteAttributeString("url", IdElement); tw.WriteAttributeString("registered",reg); tw.WriteEndElement(); //tw.WriteAttributeString("test","test"); } } else { while(level>Level[IdParent]) { tw.WriteEndElement(); Level.Remove(level); level--; } if(IdPrduit !="") { //tw.WriteElementString(Name,IdPrduit); string reg; if(License=="Y") {reg="true";} else {reg="false" ; } tw.WriteStartElement("leaf"); tw.WriteAttributeString("title",Name); tw.WriteAttributeString("url",IdElement); tw.WriteAttributeString("registered",reg); tw.WriteEndElement(); } else { tw.WriteStartElement("folder"); tw.WriteAttributeString("title",Name); tw.WriteAttributeString("img","folder.gif"); Level.add(IdElement); PrevIdParent=IdParent; PrevIdElement =IdElement; level++; } } FlagElementFirst = false; } tw.WriteEndDocument(); tw.Flush(); tw.Close(); Response.Clear(); Response.ContentEncoding = Encoding.UTF8;// //Encoding.GetEncoding(1251) ; Response.ContentType="text/xml"; Response.Write(s.ToString()); } #region Web Form Designer generated code override protected void OnInit(EventArgs e) { // // CODEGEN: This call is required by the ASP.NET Web Form Designer. // InitializeComponent(); base.OnInit(e); } ///

/// Required method for Designer support - do not modify /// the contents of this method with the code editor. ///

private void InitializeComponent() { this.Load += new System.EventHandler(this.Page_Load); } #endregion } }