我已将XMLWriter设置为使用UTF8编码,但WriteStartDocument方法仍然写入UTF16标记。这是代码的一部分:m_sbXML=NewSystem.Text.StringBuilderm_xmlWriterSettings=NewSystem.Xml.XmlWriterSettingsWithm_xmlWriterSettings.Indent=True.IndentChars="".Encoding=System.Text.Encoding.UTF8EndWithm_xmlWriter=System.Xml.XmlWriter.Create(m_sbXML,m_x