How to merge two xml file (Web.config)?

Question

I have two xml files,if i use xmlDiffPatch of microsoft,it do Delete Element,but i Dont want to delete nodes,just replace value or add nodes,How to do that?for exampel: web1.config is like ' 600 150 75 25 ' and web2.config is like this: '

<PartPriceInfo xmlns:ns2="http://www.aa.com">
    <ns2:Subaru model="Outback">
        <ns2:Muffler> 700 </ns2:Muffler>
        <ns2:Bumper> 150 </ns2:Bumper>
    </ns2:Subaru>
</PartPriceInfo>

' i want the results like below:

'
<PartPriceInfo xmlns:ns2="http://www.aa.com">
    <ns2:Subaru model="Outback">
        <ns2:Muffler> 700</ns2:Muffler>
        <ns2:Bumper> 150 </ns2:Bumper>
        <ns2:Floormat> 75 </ns2:Floormat>
        <ns2:WindShieldWipers> 25 </ns2:WindShieldWipers>
    </ns2:Subaru>
</PartPriceInfo>

'

Answer 1

Finally I found Microsoft XML Diff and Patch Tool,and my job done good.good luck every one.