obfuscar.xml

MyProject.csproj

<Project Sdk="Microsoft.NET.Sdk">

<!-- ... -->

  <Import Project="../Obfuscar.targets" />

<!-- ... -->

</Project>

Obfuscar.targets

<Project>

  <PropertyGroup>
    <EnabledRunObfuscar Condition="'$(PublishProtocol)'!=''">true</EnabledRunObfuscar>
  </PropertyGroup>
  
  <!-- To support single file, Obfuscar should run on obj/ folder binaries after compilation and not after actual publish -->
  <!-- Also we need to copy compiled dependeincies for obfuscar as well -->
  <Target Name="RunObfuscar" BeforeTargets="CopyFilesToOutputDirectory" Condition="'$(EnabledRunObfuscar)'=='true'">
    <PropertyGroup>
      <ProjectBuildOutput>$(OutputPath)</ProjectBuildOutput>
      <ObfuscarRootPath>$(IntermediateOutputPath)</ObfuscarRootPath>
      <ObfuscarRootAssembliesPath>$([System.IO.Path]::Combine($(ObfuscarRootPath),"bin-copy"))</ObfuscarRootAssembliesPath>
      <ObfuscarToolPath>$([System.IO.Path]::Combine($(MSBuildThisFileDirectory),"Tools"))</ObfuscarToolPath>
      <ObfuscarToolFileName>$([System.IO.Path]::Combine($(ObfuscarToolPath),"obfuscar.console"))</ObfuscarToolFileName>
      <ObfuscarXmlFileName>obfuscar.xml</ObfuscarXmlFileName>
      <ObfuscarXmlPath>$([System.IO.Path]::Combine($(MSBuildThisFileDirectory),"Builds",$(ObfuscarXmlFileName)))</ObfuscarXmlPath>
      <ObfuscarOutput>$(ObfuscarRootPath)/Obfuscated</ObfuscarOutput>
    </PropertyGroup>

    <Message Importance="high" Text="Install Obfuscar" />
    <Exec Command="dotnet tool install Obfuscar.GlobalTool --version 2.2.32 --tool-path &quot;$(ObfuscarToolPath)&quot;" ContinueOnError="true" />

    <Message Importance="high" Text="Copy built assemblies" />
    <ItemGroup>
      <_BuildAssemblies Include="$(ProjectBuildOutput)/**/*.dll" Exclude="$(ProjectBuildOutput)/MyAssembly.dll" />
    </ItemGroup>
    <Copy SourceFiles="@(_BuildAssemblies)" DestinationFolder="$(ObfuscarRootAssembliesPath)" />

    <Message Importance="high" Text="Run Obfuscar with config from $(ObfuscarXmlPath) in directory $(ObfuscarRootPath)" />
    <Exec Command="&quot;$(ObfuscarToolFileName)&quot; &quot;$(ObfuscarXmlPath)&quot; -s" WorkingDirectory="$(ObfuscarRootPath)" />

    <ItemGroup>
      <_ObfuscatedFiles Include="$(ObfuscarOutput)/*" Exclude="$(ObfuscarOutput)/Mapping.txt" />
    </ItemGroup>
    <Message Importance="high" Text="Copy obfuscated files: @(_ObfuscatedFiles->'%(Filename)%(Extension)', ' ')" />
    <Copy SourceFiles="@(_ObfuscatedFiles)" DestinationFolder="$(ObfuscarRootPath)" />

    <ItemGroup>
      <_FilesToDelete Include="$(ObfuscarRootAssembliesPath)/*" />
    </ItemGroup>
    <Message Importance="high" Text="Cleanup after obfuscation: @(_FilesToDelete->'%(Filename)%(Extension)', ' ')"/>
    <Delete Files="@(_FilesToDelete)" />
    <RemoveDir Directories="$(ObfuscarOutput)" />
  </Target>
  
</Project>

obfuscar.xml

<?xml version='1.0'?>
<Obfuscator>
  <Var name="InPath" value="." />
  <Var name="OutPath" value="$(InPath)/Obfuscated" />
  <Var name="KeepPublicApi" value="true" />
  <Var name="HidePrivateApi" value="true" />

  <AssemblySearchPath path=".\bin-copy" />

  <Module file="$(InPath)/MyAssembly.dll">
    <SkipType name="!AvaloniaResources" />
    <SkipType name="CompiledAvaloniaXaml*" />
    <SkipNamespace name="CompiledAvaloniaXaml*" />
    <SkipField type="*" rx="\$*" />
  </Module>
</Obfuscator>