ASP.NET Core: Exclude or include files on publish

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From documentation: if you wish to specify, for example, some files to get published with your app, you can still use the known mechanisms in csproj for that (for example, the <Content> element).

There is a CopyToPublishDirectory attribute for ItemGroup elements that determines whether to copy the file to the publish directory and can have one of the following value:

  • Always,
  • PreserveNewest
  • Never

Note, that there is also similar CopyToOutputDirectory attribute for output folder.

Example (from here):

<ItemGroup>

  <None Include="notes.txt" CopyToOutputDirectory="Always" />
  <!-- CopyToOutputDirectory = { Always, PreserveNewest, Never } -->

  <Content Include="files\**\*" CopyToPublishDirectory="PreserveNewest" />
  <None Include="publishnotes.txt" CopyToPublishDirectory="Always" />
  <!-- CopyToPublishDirectory = { Always, PreserveNewest, Never } -->
</ItemGroup>

If you are interesting how project.json -.csproj migration use CopyToPublishDirectory attribute to migrate publish options, you may look into MigratePublishOptionsRule class in dotnet cli repo.

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