[WiX-users] Help with adding new elements using XMLConfig

[Uma Harano]

Hi,
I am using the XMLConfig element in Wix 3.8 to add to an existing XML file.

The xml file looks like this before running setup:

SnippetCollection>
    <Language Lang="CSharp" Guid="{694DD9B6-B865-4C5B-AD85-86356E9C88DC}">
        <SnippetDir>
            <OnOff>On</OnOff>
            <Installed>true</Installed>
            <Locale>1033</Locale>
            <DirPath>%InstallRoot%\VC#\Snippets\%LCID%\Visual C#\</DirPath>
            <LocalizedName>Visual C#</LocalizedName>
        </SnippetDir>
    </Language>
</SnippetCollection>

I want to add the highlighted lines with my setup:

SnippetCollection>
    <Language Lang="CSharp" Guid="{694DD9B6-B865-4C5B-AD85-86356E9C88DC}">
        <SnippetDir>
            <OnOff>Off</OnOff>
<!-More stuff -->
        </SnippetDir>
        <SnippetDir>
            <OnOff>On</OnOff>
            <Installed>true</Installed>
            <Locale>1033</Locale>
            <DirPath>%InstallRoot%\VC#\Snippets\%LCID%\Visual C#\</DirPath>
            <LocalizedName>Visual C#</LocalizedName>
        </SnippetDir>
    </Language>
</SnippetCollection>

In Wix these are my lines of code:
      <util:XmlConfig On="install" Action="create" Id="CreateSnippetDir" 
Node="element" File="<Path to Xml>\snippetsindex.xml" 
ElementPath="//SnippetCollection//Language" Sequence="1001"
      xmlns:util="http://schemas.microsoft.com/wix/UtilExtension"; 
Name="SnippetDir"  />
      <util:XmlConfig On="install" Action="create" Id="CreateOnOff" 
Node="element" File="<Path to Xml>\snippetsindex.xml\snippetsindex.xml" 
ElementPath="//SnippetCollection//Language/SnippetDir" Sequence="1002"
      xmlns:util="http://schemas.microsoft.com/wix/UtilExtension"; Name="OnOff" 
Value="off" />

Executing this, the resulting xml looks like this. Please note how the OnOff 
element is added within the existing SnippetDir element, not inside the new 
SnippetDir element:

<SnippetCollection>
    <Language Lang="CSharp" Guid="{694DD9B6-B865-4C5B-AD85-86356E9C88DC}">
<SnippetDir>
            <OnOff>On</OnOff>
            <Installed>true</Installed>
            <Locale>1033</Locale>
            <DirPath>%InstallRoot%\VC#\Snippets\%LCID%\Visual C#\</DirPath>
            <LocalizedName>Visual C#</LocalizedName>
        <OnOff>on</OnOff></SnippetDir>

<SnippetDir/></Language>
</SnippetCollection>

Can you please help me understand how I can fix this?
Thanks
Uma-

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