namespace button2读XML
{
    public partial class Form1 : Form
    {
        XmlDocument doc = new XmlDocument();
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            doc.Load(@"C:\Users\ASUS\Desktop\XMLFile3.xml ");    //加载Xml文件    
            XmlElement rootElem = doc.DocumentElement;   //获取根节点    
            XmlNodeList personNodes = rootElem.GetElementsByTagName("person"); //获取person子节点集合    
            foreach (XmlNode node in personNodes)
            {
                string strName = ((XmlElement)node).GetAttribute("name");   //获取name属性值    
                Console.WriteLine(strName);
                XmlNodeList subAgeNodes = ((XmlElement)node).GetElementsByTagName("age");  //获取age子XmlElement集合  
             //   Console.WriteLine(subAgeNodes);
          

                    if (subAgeNodes.Count == 1)
                    {
                        string strAge = subAgeNodes[0].InnerText;
                        textBox1.Text = strAge;
                    }
                }
            }
        }
    }