title: How to create an MSIX pckage from source with self-contained=false
body: <p>The project (netcore3.1) is being packaged with a Windows Application Packaging Project (.wapproj + .appxmanifest) and published for sideloading using:</p>
  <p>right click packaging project-&gt;Publish-&gt;Create App Packages</p>
  <p>The error is:
  &quot;It is not supported to build or publish a self-contained application without specifying a RuntimeIdentifier, Please either specify a RuntimeIdentifier or set SelfContained to false.&quot;</p>
  <p>Other answers describe workarounds and methods to get the publishing system to recognise a RuntimeIdentifier, but none explains how to disable self-contained packaging. Surely there is a flag or property that can be set to create a package without the runtime libraries.</p>