Add net472 test target

Author: MattKotsenas

Directory.Packages.props

@@ -11,6 +11,7 @@
     <PackageVersion Include="FluentAssertions" Version="7.2.0" />
     <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="17.14.1" />
     <PackageVersion Include="MSBuild.ProjectCreation" Version="15.0.0" />
+    <PackageVersion Include="Polyfill" Version="8.8.1" />
     <PackageVersion Include="xunit.v3" Version="3.0.1" />
     <PackageVersion Include="xunit.runner.visualstudio" Version="3.1.4" />
   </ItemGroup>

tests/DotNet.ReproducibleBuilds.Tests/DotNet.ReproducibleBuilds.Tests.csproj

@@ -1,9 +1,11 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>net8.0;net9.0;net10.0</TargetFrameworks>
+    <TargetFrameworks>net472;net8.0;net9.0;net10.0</TargetFrameworks>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
+    <LangVersion>latest</LangVersion>
+    <OutputType>Exe</OutputType>
 
     <IsTestProject>true</IsTestProject>
   </PropertyGroup>
@@ -21,6 +23,10 @@
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
+    <PackageReference Include="Polyfill">
+      <PrivateAssets>all</PrivateAssets>
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers</IncludeAssets>
+    </PackageReference>
   </ItemGroup>
 
   <ItemGroup>