Help with Configuration Management

[Shaun Ram]

Hi, I have this constraint. A help would be greatly appreciated.
I have this Config file.

<?xml version="1.0" encoding="utf-8" ?>
<configuratio n>
<configsections >
<sectionGroup name="mainsecti on">
<section name="Connectio nString"
type="System.Na mevaluesectionH andler,System" />
</sectiongroup>
</configsections>

<mainsection>
<connectionstri ng>
<add key="projcode1" value="database "/>
<add key="projcode2" value="database 2"/>
</connectionstrin g>
</mainsection>

I use VB.NET to read this section.
I want to use DPAPI with Machine store. For this I have to read the
connection string from config file as name value pair, Then encrypt the
connection string & want to replace back the encrypted string into the
same section of config file.
I have an issue in writing Namevalue pair into the same section. Could
somebody please help me with writing as name value pair, as an attribute
into the section.
I used configuration management application block from microsoft to
write. But then I was unable to write namevaluepair as an attribute to a
element in a node.

A help would be greatly apprecitaed.
Thanking you
Shaun
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