writing registry in wix - problem illustrated with sample wxs file - wix

Question

I am trying to write to registry using Wix.
it is failing showing the error
"The error code is 2727"
to run this sample follow the below steps.
you need a text file in c:\testinstall.txt
it installs the file testinstall.txt in
C:\Program Files\testinstall
candle sample.wxs
light sample.wixobj
sample.msi will be created
when i add this entry in the script
it is failing.
all i need is to have a script which will create a key and write some value into the
registry.
sample.wxs code
2
<Registry Id="TestKey"
Root="HKLM"
Key="SOFTWARE\testCorp"
Action="createKeyAndRemoveKeyOnUninstall">
<Registry Id="TestValue"
Name="TestValue"
Action="write"
Value="123"
Type="string" />
</Registry>
</Component>
</Directory>
</Directory>
</Directory>
<Feature Id="Feature" Level="1">
<ComponentRef Id="component0" />
<ComponentRef Id="ID0EAAA" />
</Feature>

Answer 1

Are you using WiX v2? Instead of creating the registry value with two Registry entries, just combine it all into one line.
<Registry Id="TestKey" Root="HKLM" Key="SOFTWARE\testCorp" Name="TestValue" Value="123" Type="string" Action="write" />
That's usually a lot easier. If you really want to nest them then I recommend leaving the Registry/#Action attribute off of the parent registry key so it doesn't actually end up in the MSI. Just organizes the child elements.
Note the syntax is a bit different in WiX v3.