1     XmlDocument doc = new XmlDocument();
 2             //加载xml文件
 3             doc.Load("order.xml");
 4 
 5             //根节点
 6             XmlElement root =  doc.DocumentElement;
 7            
 8             XmlNodeList xnl = root.ChildNodes;
 9 
10             //
11             //读取标签的名字
12             Console.WriteLine(xnl[0].Name);
13 
14             Console.WriteLine(xnl[0].InnerText);
15             Console.WriteLine(xnl[1].InnerText);
16 
17             XmlNode items = xnl[2];
18 
19             //orderitem
20             XmlNodeList xnl1 = items.ChildNodes;
21 
22             foreach (XmlNode node in xnl1)
23             {
24                 //获取属性的值
25                 Console.WriteLine(node.Attributes["Name"].Value);
26                 Console.WriteLine(node.Attributes["Count"].Value);
27             }

1 <?xml version="1.0" encoding="utf-8"?>
2 <Order>
3   <OrderNo>tj000001</OrderNo>
4   <CustomerName>微微</CustomerName>
5   <Items>
6     <OrderItem Name="媳妇" Count="10" />
7     <OrderItem Name="房子" Count="10" />
8   </Items>
9 </Order>

            XmlDocument doc = new XmlDocument();
            //加载xml文件
            doc.Load("books.xml");

            //根节点
            XmlElement books = doc.DocumentElement;

            //books 下的所有book元素
            XmlNodeList xnl = books.ChildNodes;
            foreach (XmlNode node in xnl)
            {
                Console.WriteLine(node.ChildNodes[0].InnerText);
                Console.WriteLine(node.ChildNodes[1].InnerText);
            }

<?xml version="1.0" encoding="utf-8"?>
<Books>
  <Book>
    <Name>&lt;b&gt;123&lt;/b&gt;</Name>
    <Price>10</Price>
  </Book>
  <Book>
    <Name>12梅2</Name>
    <Price>20</Price>
  </Book>
  <Book>
    <Name>c#图解教程</Name>
    <Price>30</Price>
  </Book>
  <Book>
    <Name>XX梅2</Name>
    <Price>20</Price>
  </Book>
</Books>

 1             //内存中创建一个xml
 2             XmlDocument doc = new XmlDocument();
 3             //
 4             XmlDeclaration dec =  doc.CreateXmlDeclaration("1.0", "utf-8", null);
 5             doc.AppendChild(dec);
 6 
 7             //根节点 Order
 8             XmlElement order = doc.CreateElement("Order");
 9             doc.AppendChild(order);
10             //
11             XmlElement customerName = doc.CreateElement("CustomerName");
12             customerName.InnerText = "微微";
13             //
14             order.AppendChild(customerName);
15             //
16             XmlElement orderNo = doc.CreateElement("OrderNo");
17             orderNo.InnerText = "tj000001";
18             //
19             order.AppendChild(orderNo);
20             //
21             XmlElement items = doc.CreateElement("Items");
22             order.AppendChild(items);
23 
24 
25             //
26             XmlElement orderItem1 = doc.CreateElement("OrderItem");
27             orderItem1.SetAttribute("Name", "媳妇");
28             orderItem1.SetAttribute("Count","10");
29             items.AppendChild(orderItem1);
30 
31             //
32             XmlElement orderItem2 = doc.CreateElement("OrderItem");
33             orderItem2.SetAttribute("Name","房子");
34             orderItem2.SetAttribute("Count","10");
35             items.AppendChild(orderItem2);
36 
37             //保存到文件
38             doc.Save("order.xml");

<?xml version="1.0" encoding="utf-8"?>
<Order>
  <CustomerName>微微</CustomerName>
  <OrderNo>tj000001</OrderNo>
  <Items>
    <OrderItem Name="媳妇" Count="10" />
    <OrderItem Name="房子" Count="10" />
  </Items>
</Order>