Is it possible to add one more custome attribute in the <add> element of <appSettings> section

Hi
I need to add one more custom attribute("Description")  in the <add> element of <appSettings> section. By default it supports "Key" and "Value" attribute in the <add> element, We need to add one more attribute ("Description") in this element.
 
For Example
By Default it is like
<appSettings>
<add key="name" value="value"/>
</appSettings>

I need to modify like this

<appSettings>
<add key="name" value="value" Description="Some descrption"/>
</appSettings>

Please help me how to Incorporate the above thing or suggest me to do the above thing with alternate method.

Thanks & Regards
mk_mur