Don't run net472 tests on linux

Author: decriptor

Directory.Build.props

@@ -1,5 +1,11 @@
 <Project>
 
+	<PropertyGroup>
+		<IsMac>$([MSBuild]::IsOSPlatform('OSX'))</IsMac>
+		<IsWindows>$([MSBuild]::IsOSPlatform('Windows'))</IsWindows>
+		<IsLinux>$([MSBuild]::IsOSPlatform('Linux'))</IsLinux>
+	</PropertyGroup>
+
 	<PropertyGroup>
 		<ReleaseVersion>2.5.0.0</ReleaseVersion>
 		<RepositoryUrl>https://github.com/mono/taglib-sharp</RepositoryUrl>

tests/TaglibSharp.Tests/TaglibSharp.Tests.csproj

@@ -1,7 +1,8 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
 	<PropertyGroup>
-		<TargetFrameworks>$(ExeTargetFrameworks)</TargetFrameworks>
+		<TargetFrameworks>net8.0;net9.0</TargetFrameworks>
+		<TargetFrameworks Condition="'$(IsLinux)' != 'true'">net472;$(TargetFrameworks)</TargetFrameworks>
 		<EnableMSTestRunner>true</EnableMSTestRunner>
 		<OutputType>Exe</OutputType>
 		<TestingPlatformDotnetTestSupport>true</TestingPlatformDotnetTestSupport>