wix service dependencies

Question

My product has several features including two services. Let's call them ServiceA and ServiceB. Both of these service features are optional. However if both ServiceA and ServiceB is selected during install I want to create a service dependency between them so that ServiceB will depend on ServiceA (in other words ServiceB must always start before ServiceA is launched).

How do I achieve this in WIX 3.6?

Answer 1

<ServiceInstall Id="ServiceA" DisplayName="ServiceA" Name="ServiceA" 
    Account="LocalSystem" Start="auto" ErrorControl="normal" Type="ownProcess">
    <ServiceDependency Id="ServiceB"/>
</ServiceInstall>

That should work, check out ServiceDependency documentation element