diff --git a/Directory.Build.props b/Directory.Build.props
index fc9bbe7652..dfa5898118 100644
--- a/Directory.Build.props
+++ b/Directory.Build.props
@@ -24,6 +24,9 @@
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
     <UseArtifactsOutput>true</UseArtifactsOutput>
 
+    <LangVersion>latest</LangVersion>
+    <ImplicitUsings>enable</ImplicitUsings>
+
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/Jint.Tests.CommonScripts/Jint.Tests.CommonScripts.csproj b/Jint.Tests.CommonScripts/Jint.Tests.CommonScripts.csproj
index 49c60a42b9..323b5a9d9d 100644
--- a/Jint.Tests.CommonScripts/Jint.Tests.CommonScripts.csproj
+++ b/Jint.Tests.CommonScripts/Jint.Tests.CommonScripts.csproj
@@ -1,8 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>net8.0</TargetFrameworks>
-    <TargetFrameworks Condition="'$(OS)' == 'Windows_NT'">$(TargetFrameworks);net462</TargetFrameworks>
+    <TargetFrameworks>net462;net8.0</TargetFrameworks>
     <IsPackable>false</IsPackable>
     <ImplicitUsings>enable</ImplicitUsings>
     <LangVersion>latest</LangVersion>
diff --git a/Jint.Tests.PublicInterface/Jint.Tests.PublicInterface.csproj b/Jint.Tests.PublicInterface/Jint.Tests.PublicInterface.csproj
index 09d37f56f5..805f645b94 100644
--- a/Jint.Tests.PublicInterface/Jint.Tests.PublicInterface.csproj
+++ b/Jint.Tests.PublicInterface/Jint.Tests.PublicInterface.csproj
@@ -1,8 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>net8.0</TargetFrameworks>
-    <TargetFrameworks Condition="'$(OS)' == 'Windows_NT'">$(TargetFrameworks);net462</TargetFrameworks>
+    <TargetFrameworks>net462;net8.0</TargetFrameworks>
     <AssemblyOriginatorKeyFile>..\Jint\Jint.snk</AssemblyOriginatorKeyFile>
     <SignAssembly>true</SignAssembly>
     <IsPackable>false</IsPackable>
@@ -17,10 +16,6 @@
     <ProjectReference Include="..\Jint\Jint.csproj" />
   </ItemGroup>
 
-  <ItemGroup>
-    <Reference Include="Microsoft.CSharp" Condition=" '$(TargetFramework)' == 'net462' " />
-  </ItemGroup>
-
   <ItemGroup>
     <PackageReference Include="Acornima.Extras" />
     <PackageReference Include="Flurl.Http.Signed" />
diff --git a/Jint.Tests.Test262/Jint.Tests.Test262.csproj b/Jint.Tests.Test262/Jint.Tests.Test262.csproj
index 710ce5e932..ba21aaef11 100644
--- a/Jint.Tests.Test262/Jint.Tests.Test262.csproj
+++ b/Jint.Tests.Test262/Jint.Tests.Test262.csproj
@@ -2,7 +2,6 @@
 
   <PropertyGroup>
     <TargetFramework>net8.0</TargetFramework>
-    <!--<TargetFrameworks Condition="'$(OS)' == 'Windows_NT'">$(TargetFrameworks);net461</TargetFrameworks>-->
     <AssemblyOriginatorKeyFile>..\Jint\Jint.snk</AssemblyOriginatorKeyFile>
     <SignAssembly>true</SignAssembly>
     <IsPackable>false</IsPackable>
diff --git a/Jint.Tests/Jint.Tests.csproj b/Jint.Tests/Jint.Tests.csproj
index 0fc40fa091..3d0f151e11 100644
--- a/Jint.Tests/Jint.Tests.csproj
+++ b/Jint.Tests/Jint.Tests.csproj
@@ -19,10 +19,6 @@
     <ProjectReference Include="..\Jint\Jint.csproj" />
   </ItemGroup>
 
-  <ItemGroup>
-    <Reference Include="Microsoft.CSharp" Condition=" '$(TargetFramework)' == 'net462' " />
-  </ItemGroup>
-
   <ItemGroup>
     <PackageReference Include="Acornima.Extras" />
     <PackageReference Include="FluentAssertions" />
diff --git a/Jint.Tests/Parser/JavascriptParserTests.cs b/Jint.Tests/Parser/JavascriptParserTests.cs
index 3ef0590939..0a2659895b 100644
--- a/Jint.Tests/Parser/JavascriptParserTests.cs
+++ b/Jint.Tests/Parser/JavascriptParserTests.cs
@@ -1,6 +1,4 @@
-using Jint.Runtime;
-
-namespace Jint.Tests.Parsing;
+namespace Jint.Tests.Parsing;
 
 public class JavascriptParserTests
 {
diff --git a/Jint.Tests/Runtime/InteropTests.cs b/Jint.Tests/Runtime/InteropTests.cs
index 2c3a062524..2c96ed88d8 100644
--- a/Jint.Tests/Runtime/InteropTests.cs
+++ b/Jint.Tests/Runtime/InteropTests.cs
@@ -3,7 +3,6 @@
 using System.Reflection;
 using System.Runtime.CompilerServices;
 using Jint.Native;
-using Jint.Native.Symbol;
 using Jint.Runtime;
 using Jint.Runtime.Interop;
 using Jint.Tests.Runtime.Converters;
diff --git a/Jint/AstExtensions.cs b/Jint/AstExtensions.cs
index 4551fd207b..3cab91dde5 100644
--- a/Jint/AstExtensions.cs
+++ b/Jint/AstExtensions.cs
@@ -13,7 +13,9 @@ namespace Jint
 {
     public static class AstExtensions
     {
+#pragma warning disable CS0649 // Field is never assigned to, and will always have its default value
         internal static readonly SourceLocation DefaultLocation;
+#pragma warning restore CS0649 // Field is never assigned to, and will always have its default value
 
         public static JsValue GetKey<T>(this T property, Engine engine) where T : IProperty => GetKey(property.Key, engine, property.Computed);
 
diff --git a/Jint/Jint.csproj b/Jint/Jint.csproj
index a0c9568748..460620fc9d 100644
--- a/Jint/Jint.csproj
+++ b/Jint/Jint.csproj
@@ -7,8 +7,6 @@
     <SignAssembly>true</SignAssembly>
     <IsPackable>true</IsPackable>
 
-    <LangVersion>latest</LangVersion>
-    <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
 
diff --git a/Jint/Native/Generator/GeneratorInstance.cs b/Jint/Native/Generator/GeneratorInstance.cs
index dc6cae2480..8ef6bfbd39 100644
--- a/Jint/Native/Generator/GeneratorInstance.cs
+++ b/Jint/Native/Generator/GeneratorInstance.cs
@@ -13,7 +13,9 @@ internal sealed class GeneratorInstance : ObjectInstance
 {
     internal GeneratorState _generatorState;
     private ExecutionContext _generatorContext;
+#pragma warning disable CS0649 // Field is never assigned to, and will always have its default value
     private readonly JsValue? _generatorBrand;
+#pragma warning restore CS0649 // Field is never assigned to, and will always have its default value
     private JintStatementList _generatorBody = null!;
 
     public JsValue? _nextValue;
diff --git a/Jint/Runtime/Interpreter/Expressions/JintLiteralExpression.cs b/Jint/Runtime/Interpreter/Expressions/JintLiteralExpression.cs
index f3f28d947d..561a160882 100644
--- a/Jint/Runtime/Interpreter/Expressions/JintLiteralExpression.cs
+++ b/Jint/Runtime/Interpreter/Expressions/JintLiteralExpression.cs
@@ -1,4 +1,3 @@
-using System.Numerics;
 using System.Text.RegularExpressions;
 using Jint.Native;
 
diff --git a/Jint/Runtime/Interpreter/Expressions/JintUpdateExpression.cs b/Jint/Runtime/Interpreter/Expressions/JintUpdateExpression.cs
index 3d361b0739..fa2784618b 100644
--- a/Jint/Runtime/Interpreter/Expressions/JintUpdateExpression.cs
+++ b/Jint/Runtime/Interpreter/Expressions/JintUpdateExpression.cs
@@ -1,6 +1,5 @@
 using Jint.Native;
 using Jint.Runtime.Environments;
-using Environment = Jint.Runtime.Environments.Environment;
 
 namespace Jint.Runtime.Interpreter.Expressions
 {