c# 代码创建xml文件

 /***创建文件***/#region /***创建文件***/
        public void   CreateXmlFile(string strFilePath,string[] strElement,string[] strElementString)
        {    
            try
            {
                XmlDocument xmldoc = new XmlDocument( ) ;
                XmlDeclaration   xn   =  xmldoc.CreateXmlDeclaration("1.0","gb2312",null);   
                xmldoc.AppendChild(xn);
    
                //加入一个根元素
                XmlElement  xmlelem = xmldoc.CreateElement ( "" , "myinfo" , "" ) ;
                xmldoc.AppendChild(xmlelem) ;
                XmlElement xe1=xmldoc.CreateElement("user"); 
   
                XmlElement xesub2=xmldoc.CreateElement(strElement[0].ToString());
                xesub2.InnerText=strElementString[0].ToString();
                xe1.AppendChild(xesub2);
        
                XmlElement xesub3=xmldoc.CreateElement(strElement[1].ToString());
                xesub3.InnerText=strElementString[1].ToString();
                xe1.AppendChild(xesub3);

                xmldoc.ChildNodes.Item(1).AppendChild (xe1) ;
 
                //保存创建好的XML文档
                try
                {
                    xmldoc.Save(strFilePath) ; 
                }
                catch (Exception e )
                {
                    throw e;
                }
                
    
            }
            catch (Exception err)
            {
                throw err;    
            }
            
        }

        #endregion

给xml添加"<?xml version="1.0" encoding="gb2312"?> "格式:
XmlDocument xmldoc = new XmlDocument( ) ;
    XmlDeclaration   xn   =  xmldoc.CreateXmlDeclaration("1.0","gb2312",null);  
    xmldoc.AppendChild(xn);

最后创建好的xml文件:
<?xml version="1.0" encoding="gb2312"?>
<myinfo>
  <user>
   ***
  </user>
</myinfo>