读写XML字符串信息

using (var sw = new StringWriter())
{
    var xtw = new XmlTextWriter(sw);
    //根节点
    xtw.WriteStartElement("Test");
    //内容
    xtw.WriteAttributeString("Name", "内容");
    xtw.WriteEndElement();
    string strInString = sw.ToString();
}

string strInString = "";
var xx = new XmlDocument();
xx.LoadXml(strInString);//加载xml
var xxList = xx.GetElementsByTagName("Test"); //取得节点名为row的XmlNode集合
foreach (XmlNode xxNode in xxList)
{
  //col节点name属性值
    if (xxNode.Attributes != null)
    {
     xxNode.Attributes["Name"].Value;
    }
}