title: WiX: InstallService conditionally, but install file unconditionally
body: <p>In Windows Install XML toolset, to install a service, we group <code>&lt;ServiceInstall&gt;</code> with a <code>&lt;File&gt;</code> in a <code>&lt;Component&gt;</code>. To conditionally install the service, we put <code>&lt;Condition&gt;</code> under the <code>&lt;Component&gt;</code>. However if the condition is false, the file will not be installed too. If I put the <code>&lt;File&gt;</code> in an unconditional <code>&lt;Component&gt;</code>, then the service has no executable file path and thus installation will fail. If I put the <code>&lt;File&gt;</code> in both <code>&lt;Component&gt;</code>, duplicate symbols will be found.</p>
  
  <p>The question is, can we install a service conditionally, but install the associated executable file unconditionally?</p>
  
  <p>Thanks!</p>