kenlistian

二者在通过Load方法加载XML时：

XDocument.Load()    加载整个XML文档  包括根节点

XElement.Load()       不加载XML的根节点.

XElement.Load()

    File.WriteAllText("Test.xml", @"<Root>  

     <Child1>1</Child1> 

     <Child2>2</Child2> 

      <Child3>3</Child3> 

      </Root>"); 

1. Console.WriteLine("Querying tree loaded with XElement.Load");  
2. Console.WriteLine("----");  
4. XElement doc = XElement.Load("Test.xml");  
5. IEnumerable<XElement> childList =    from el in doc.Elements()  
6.     select el;  
8. foreach (XElement e in childList)  
9.     Console.WriteLine(e); 

Querying tree loaded with XElement.Load  

1. ----  
2. <Child1>1</Child1>  
3. <Child2>2</Child2>  
4. <Child3>3</Child3> 

XDocument.Load()

1. File.WriteAllText("Test.xml", @"<Root>  
2.     <Child1>1</Child1>  
3.     <Child2>2</Child2>  
4.     <Child3>3</Child3>  
5. </Root>");  
7. Console.WriteLine("Querying tree loaded with XDocument.Load");  
8. Console.WriteLine("----");  
9. XDocument doc = XDocument.Load("Test.xml");  
10. IEnumerable<XElement> childList =   from el in doc.Elements()   select el;  
12. foreach (XElement e in childList)  
13.     Console.WriteLine(e); 

结果：

1. Querying tree loaded with XDocument.Load  
2. ----  
3. <Root>  
4.   <Child1>1</Child1>  
5.   <Child2>2</Child2>  
6.   <Child3>3</Child3>  
7. </Root>