NetCore Native reflection works better when attributes are allocated

[snakefoot]

Makes it possible to setup a console application with minimal configuration:

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

  <PropertyGroup>
    <OutputType>Exe</OutputType>
    <TargetFramework>netcoreapp2.1</TargetFramework>
  </PropertyGroup>

  <ItemGroup>
    <RdXmlFile Include="rd.xml" />
  </ItemGroup>

  <ItemGroup>
    <PackageReference Include="Microsoft.DotNet.ILCompiler" Version="1.0.0-alpha-*" />
    <PackageReference Include="NLog" Version="NLog.4.5.10.8565-PR2979" />
  </ItemGroup>

  <ItemGroup>
    <None Update="NLog.config">
      <CopyToOutputDirectory>Always</CopyToOutputDirectory>
    </None>
  </ItemGroup>

</Project>

Rd.xml:

<Directives>
  <Application>
    <Assembly Name="mscorlib" />
    <Assembly Name="NLog" Dynamic="Required All" />
  </Application>
</Directives>

See pre-release-build here: https://ci.appveyor.com/project/nlog/nlog/builds/19896626/artifacts

[codecov]

Codecov Report

Merging #2979 into dev will decrease coverage by <1%.
The diff coverage is 82%.

@@          Coverage Diff           @@
##             dev   #2979    +/-   ##
======================================
- Coverage     80%     80%   -<1%     
======================================
  Files        331     331            
  Lines      25715   25721     +6     
  Branches    3337    3337            
======================================
- Hits       20633   20611    -22     
- Misses      4140    4172    +32     
+ Partials     942     938     -4

[304NotModified]

Thanks!

[snakefoot]

Just tested with NetCoreApp3.1 and NLog works with this config:

    <PublishTrimmed>true</PublishTrimmed>
    <PublishSingleFile>true</PublishSingleFile>
    <RuntimeIdentifier>win-x64</RuntimeIdentifier>

Published executable for hello-world-app becomes 36,1 MByte.

Surprised this was not needed:

<ItemGroup>
  <TrimmerRootAssembly Include="NLog" />
</ItemGroup>