如何更改所有属性名并将值保存在c# XML中?

I have this in my xml file

我在xml文件中有这个

<CPU> 
<NEW type="DOS" model="SV112">dos-8875</NEW> 
<NEW type="DIN" model="SV544">din-9984</NEW> 
<NEW type="FTP" model="SV774">ftp-9952</NEW> 
<NEW type="DOS" model="SV112">dos-8854</NEW> 
</CPU>
<CP