对linq to XML多层次结构进行分组

XDocument xmlDoc = XDocument.Load("data.xml"); // 加载XML文档

var groups = xmlDoc.Descendants("Group") // 获取所有Group元素
                  .GroupBy(g => (string)g.Attribute("name")) // 根据name属性进行分组
                  .Select(g => new
                  {
                      GroupName = g.Key,
                      Items = g.Descendants("Item").Select(i => (string)i).ToList()
                  }); // 选择分组结果

foreach (var group in groups)
{
    Console.WriteLine("Group Name: " + group.GroupName);
    Console.WriteLine("Items: ");
    foreach (var item in group.Items)
    {
        Console.WriteLine("- " + item);
    }
    Console.WriteLine();
}

<Root>
  <Group name="Group1">
    <Item>Item1</Item>
    <Item>Item2</Item>
  </Group>
  <Group name="Group2">
    <Item>Item3</Item>
    <Item>Item4</Item>
  </Group>
</Root>

Group Name: Group1
Items:
- Item1
- Item2

Group Name: Group2
Items:
- Item3
- Item4