NatTypeTester/STUN/STUN.csproj

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

  <PropertyGroup>
    <TargetFramework>netstandard2.0</TargetFramework>
    <LangVersion>latest</LangVersion>
    <Nullable>enable</Nullable>
    <DefineConstants>TRACE;ReactiveUI</DefineConstants>
  </PropertyGroup>

  <ItemGroup>
    <PackageReference Include="ReactiveUI.Fody" Version="13.3.1" Condition="$(DefineConstants.Contains('ReactiveUI'))" />
  </ItemGroup>

</Project>