通过XmlNodeList迭代，值始终相同

I have the following XML:

我有以下XML：

<xmlRequest>
<stats>
<match mid='40704828'>
    <match_stats>
    <ms aid='254664' cli_name='Hero_Engineer'>
        <stat name='nickname'>lethallynx</stat>
        <stat name='level'>11</stat>
    </ms>
    <ms aid='354522' cli_name='Hero_Devourer'>
        <stat name='nickname'>AbendrothA</stat>
        <stat name='level'>12</stat>
    </ms>
    </match_stats>
</match>
</stats>
</xmlRequest>
<xmlRequ