MemoryStream對象提供了無需進行IO就可以創建Stream的方法，XmlTextWriter和XmlReader提供快速書寫和讀取XML內容的方法，結合MemoryStream，就可以直接在內存中構造XmlTextWriter，並用XMLReader進行讀取。
使用MemoryStream和XmlTextWriter進行書寫XML,需要注意兩點：XMLTextWriter.Flush操作和重設MemoryStream.Position = 0。
C#
<![CDATA[<%@ Page Language="C#"%>
<%@ Import Namespace="System.Xml" %>
<%@ Import Namespace="System.IO" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>XMLReader 讀取器讀取內存流 MemoryStream 的注意事項</title>
<meta name="viewport" content="width=device-width, initial-scale=1.0"></head>
<body>
<form id="form1" runat="server">
</form>
</body>
</html>
]]>
VB.Net
<![CDATA[Protected Sub Button1_Click(ByVal sender As Object, ByVal e As EventArgs)
Response.Clear
Response.ContentType = "text/xml"
Dim msXml As MemoryStream = New MemoryStream
Dim xmlWriter As XmlTextWriter = New XmlTextWriter(msXml, Encoding.UTF8)
xmlWriter.WriteStartElement("rss")
xmlWriter.WriteAttributeString("version", "2.0")
xmlWriter.WriteStartElement("channel")
xmlWriter.WriteElementString("title", "【孟憲會之精彩世界】")
xmlWriter.WriteElementString("link", "http://dotnet.aspx.cc/Rss.aspx")
xmlWriter.WriteElementString("description", "NET開發技術。")
xmlWriter.WriteElementString("language", "zh-CN")
xmlWriter.WriteElementString("copyright", "Copyright 1999-2007【孟憲會之精彩世界】")
xmlWriter.WriteElementString("managingEditor", "amxh[AT]21cn.com")
xmlWriter.WriteStartElement("image")
xmlWriter.WriteElementString("title", "【孟憲會之精彩世界】")
xmlWriter.WriteElementString("width", "144")
xmlWriter.WriteElementString("height", "35")
xmlWriter.WriteElementString("link", "http://dotnet.aspx.cc/")
xmlWriter.WriteElementString("url", "/School/UploadFiles_7810/201005/20100529214558524.gif")
xmlWriter.WriteEndElement
xmlWriter.WriteStartElement("item")
XMLWriter.WriteElementString("title", "ASP.NET 2.0中直接將Access數據庫導入到Excel文件中")
XMLWriter.WriteElementString("description", "ASP.Net 2.0中直接將Access數據庫導入到Excel文件中")
XMLWriter.WriteElementString("link", "http://dotnet.aspx.cc/article/a933b187-06c3-4263-9eec-414a54d9c815/read.ASPx")
xmlWriter.WriteElementString("pubDate", "Sat, 02 Dec 2006 09:39:58 GMT")
xmlWriter.WriteEndElement
xmlWriter.WriteEndElement
xmlWriter.WriteEndElement
xmlWriter.Flush
msXml.Position = 0
Dim xmlReader As XmlReader = XmlReader.Create(msXml)
While xmlReader.Read
If xmlReader.Name = "rss" Then
Response.Write(xmlReader.ReadOuterXml)
End If
End While
Response.End
msXml.Close
xmlWriter.Close
XMLReader.Close
End Sub
]]>