GridView的RowDeleting 操作XML删除问题？？

我刚接触XML，不太清楚XML地操作方法,我想问一下GridView的RowDeleting操作XML删除应该怎么写？？我想删除指定 <AD> </AD>及AD下的所有子节点！ 谁能帮帮忙？？
XML格式：
XML code:

<?xml version="1.0" standalone="yes"?>
<ADlist>
<AD id="AD1">
<title>xxxxxxxxxxxxx</title>
<code>xxxxxxxxxxxxx</code>
</AD>
<AD id="AD2">
<title>yyyyyyyyyyyyyy</title>
<code>yyyyyyyyyyyyyy</code>
</AD>
</ADlist>

---

VB.NET code:
Protected Sub GridView1_RowDeleting(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewDeleteEventArgs) Handles GridView1.RowDeleting
BindGrid()
Dim oDs As DataSet = GridView1.DataSource
oDs.Tables(0).Rows(GridView1.Rows(e.RowIndex).DataItemIndex).Delete()
oDs.WriteXml(Request.PhysicalApplicationPath + "XMLFile.xml")
BindGrid()
End Sub

---

楼上的BindGrid()是什么？？有C#的吗？？？

---

在RowDeleting中加入下面的，你自己需要改造一些地方:
C# code:

XmlDocument doc = new XmlDocument();