C# 写XML文件

/// <summary>x
/// 修改xml文件
/// </summary>
/// <param name="dt"></param>
private void ModifyXml(DataTable dt)
{
  XmlDataDocument doc = new XmlDataDocument();
  try
  {
    doc.Load(Xml);
    XmlNode dataTableSettingsNode = doc.SelectSingleNode("DataTable_Settings");//根结点
    XmlNode dataCellsNode = dataTableSettingsNode.SelectSingleNode("data_cells");
    if (null == dataCellsNode) return;
    XmlNodeList dataCellNode = dataCellsNode.SelectNodes("data_cell");

    foreach (XmlNode node in dataCellNode)
    {
      var chinesename = node.SelectSingleNode("chinese_name").InnerText;
      var row = SearchRows(chinesename, dt);
      node.SelectSingleNode("show_index").InnerText = (int.Parse(row[0].ToString()) + 1).ToString();
      node.SelectSingleNode("visible").InnerText = row[1].ToString();
      node.SelectSingleNode("width").InnerText = row[3].ToString();
      switch (row[4].ToString())
      {
        case "左对齐":
          node.SelectSingleNode("align").InnerText = "1";
          break;
        case "右对齐":
          node.SelectSingleNode("align").InnerText = "2";
          break;
        case "居中对齐":
          node.SelectSingleNode("align").InnerText = "0";
          break;
        default: break;
      }
    }
    doc.Save(Xml);
  }
  catch (Exception ex)
  {

  }
}

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