<province id="642" name="北京">
<city id="643" name="北京市">
<county id="644" name="东城区" />
</city>
</province>
C# 如何写
<province id="642" name="北京">
<city id="643" name="北京市">
<county id="644" name="东城区" />
</city>
</province>
C# 如何写