title: Error while creating app package with "fullTrustProcess" pointing to a executable
body: <p>I am trying to deploy the sample application for bridging AppServices with a UWP application. The sample runs and builds just fine but when I try to follow the guide to package the whole thing it gives me an error.</p>
  
  <p><a href="https://msdn.microsoft.com/en-us/windows/uwp/packaging/packaging-uwp-apps" rel="noreferrer">Link to the packaging guide</a></p>
  
  <p><a href="https://github.com/Microsoft/DesktopBridgeToUWP-Samples/tree/master/Samples/AppServiceBridgeSample" rel="noreferrer">AppService Bridge Sample repository here.</a></p>
  
  <p>Error message:</p>
  
  <pre><code> Error Manifest validation error: Line 36, Column 64, Reason: The file name  "BackgroundProcess.exe" declared for element "*[local-name()='Applications']/*[local-name()='Application']/*[local-name()='Extensions']/*[local-name()='Extension' and @Category='windows.fullTrustProcess']" doesn't exist in the package.
  </code></pre>
  
  <p>I've found the code-snippet generating the error, but I have haven't found a fix for it yet. </p>
  
  <p>If I <strong>remove</strong> the following code from the file <strong>Package.appxmanifest</strong>, visual studio successfully builds the package:</p>
  
  <pre><code>&lt;Extensions&gt;
    &lt;uap:Extension Category="windows.appService"&gt;
      &lt;uap:AppService Name="CommunicationService" /&gt;
    &lt;/uap:Extension&gt;
    &lt;desktop:Extension Category="windows.fullTrustProcess" Executable="BackgroundProcess.exe" /&gt;
  &lt;/Extensions&gt;
  </code></pre>
  
  <p>But this will clearly also remove the bridging to the process which is the whole point of this exercise.</p>
  
  <p>This seems to be somewhat related to this question but the difference is I have a .exe and that question seems to answer it for .dlls:</p>
  
  <blockquote>
    <p><a href="https://stackoverflow.com/questions/32697674/error-when-building-universal-app-for-the-store-manifest-references-file-myap">Error when building universal app for the store: &quot;Manifest references file &#39;MyAppName.dll&#39; which is not part of the payload.&quot;</a></p>
  </blockquote>
  
  <p>(Updating UWP Tools did not seem to fix it.)</p>