Update to .NET 8 to fix build

.NET 6 was deprecated so move to .NET 8 and possibly .NET 10 after it
releases.

29 files changed, 60 insertions, 35 deletions

diff --git a/src/ext/Bal/test/WixToolsetTest.BootstrapperApplications/WixToolsetTest.BootstrapperApplications.csproj b/src/ext/Bal/test/WixToolsetTest.BootstrapperApplications/WixToolsetTest.BootstrapperApplications.csproj
index 6a9b5856..b2672472 100644
--- a/src/ext/Bal/test/WixToolsetTest.BootstrapperApplications/WixToolsetTest.BootstrapperApplications.csproj
+++ b/src/ext/Bal/test/WixToolsetTest.BootstrapperApplications/WixToolsetTest.BootstrapperApplications.csproj
@@ -3,7 +3,7 @@
 
 <Project Sdk="MSTest.Sdk">
   <PropertyGroup>
-    <TargetFramework>net6.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
     <IsWixMSTestProject>true</IsWixMSTestProject>
   </PropertyGroup>
 
diff --git a/src/ext/Bal/test/examples/EarliestCoreMBA/Example.EarliestCoreMBA.csproj b/src/ext/Bal/test/examples/EarliestCoreMBA/Example.EarliestCoreMBA.csproj
index 93ceb7d4..73428ece 100644
--- a/src/ext/Bal/test/examples/EarliestCoreMBA/Example.EarliestCoreMBA.csproj
+++ b/src/ext/Bal/test/examples/EarliestCoreMBA/Example.EarliestCoreMBA.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net6.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
     <RuntimeIdentifiers>win-x86;win-x64</RuntimeIdentifiers>
     <OutputType>WinExe</OutputType>
     <DebugType>embedded</DebugType>
diff --git a/src/ext/Bal/test/examples/LatestCoreMBA/Example.LatestCoreMBA.csproj b/src/ext/Bal/test/examples/LatestCoreMBA/Example.LatestCoreMBA.csproj
index 96587d26..a6302ad5 100644
--- a/src/ext/Bal/test/examples/LatestCoreMBA/Example.LatestCoreMBA.csproj
+++ b/src/ext/Bal/test/examples/LatestCoreMBA/Example.LatestCoreMBA.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net6.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
     <RuntimeIdentifiers>win-x86;win-x64</RuntimeIdentifiers>
     <OutputType>WinExe</OutputType>
     <DebugType>embedded</DebugType>
diff --git a/src/ext/Bal/test/examples/WPFCoreMBA/Example.WPFCoreMBA.csproj b/src/ext/Bal/test/examples/WPFCoreMBA/Example.WPFCoreMBA.csproj
index 37639021..d5a721ec 100644
--- a/src/ext/Bal/test/examples/WPFCoreMBA/Example.WPFCoreMBA.csproj
+++ b/src/ext/Bal/test/examples/WPFCoreMBA/Example.WPFCoreMBA.csproj
@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <OutputType>WinExe</OutputType>
-    <TargetFramework>net6.0-windows</TargetFramework>
+    <TargetFramework>net8.0-windows</TargetFramework>
     <RuntimeIdentifiers>win-x86;win-x64</RuntimeIdentifiers>
     <Description>WPF .NET Core MBA</Description>
     <UseWPF>true</UseWPF>
diff --git a/src/ext/Bal/wixext-backward-compatible/WixToolset.Bal.wixext.csproj b/src/ext/Bal/wixext-backward-compatible/WixToolset.Bal.wixext.csproj
index 91253621..4585efbf 100644
--- a/src/ext/Bal/wixext-backward-compatible/WixToolset.Bal.wixext.csproj
+++ b/src/ext/Bal/wixext-backward-compatible/WixToolset.Bal.wixext.csproj
@@ -5,7 +5,7 @@
   <Import Project="..\..\WixExt.props" />
 
   <PropertyGroup>
-    <TargetFramework>net6.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
     <IncludeBuildOutput>false</IncludeBuildOutput>
     <Title>WiX Toolset BootstrapperApplications extension</Title>
     <Description>WiX Toolset BootstrapperApplications extension</Description>
diff --git a/src/ext/ComPlus/test/WixToolsetTest.ComPlus/ComPlusExtensionFixture.cs b/src/ext/ComPlus/test/WixToolsetTest.ComPlus/ComPlusExtensionFixture.cs
index 7b38ef54..ef3c8b00 100644
--- a/src/ext/ComPlus/test/WixToolsetTest.ComPlus/ComPlusExtensionFixture.cs
+++ b/src/ext/ComPlus/test/WixToolsetTest.ComPlus/ComPlusExtensionFixture.cs
@@ -1,9 +1,12 @@
 // Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
 
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+
+[assembly: Parallelize(Scope = ExecutionScope.MethodLevel)]
+
 namespace WixToolsetTest.ComPlus
 {
     using System.Linq;
-    using Microsoft.VisualStudio.TestTools.UnitTesting;
     using WixInternal.MSTestSupport;
     using WixInternal.Core.MSTestPackage;
     using WixToolset.ComPlus;
diff --git a/src/ext/ComPlus/test/WixToolsetTest.ComPlus/WixToolsetTest.ComPlus.csproj b/src/ext/ComPlus/test/WixToolsetTest.ComPlus/WixToolsetTest.ComPlus.csproj
index d0a7081b..2bd2e48f 100644
--- a/src/ext/ComPlus/test/WixToolsetTest.ComPlus/WixToolsetTest.ComPlus.csproj
+++ b/src/ext/ComPlus/test/WixToolsetTest.ComPlus/WixToolsetTest.ComPlus.csproj
@@ -3,7 +3,7 @@
 
 <Project Sdk="MSTest.Sdk">
   <PropertyGroup>
-    <TargetFramework>net6.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
     <IsWixMSTestProject>true</IsWixMSTestProject>
   </PropertyGroup>
 
diff --git a/src/ext/Dependency/test/WixToolsetTest.Dependency/DependencyExtensionFixture.cs b/src/ext/Dependency/test/WixToolsetTest.Dependency/DependencyExtensionFixture.cs
index ade2a12e..4104395f 100644
--- a/src/ext/Dependency/test/WixToolsetTest.Dependency/DependencyExtensionFixture.cs
+++ b/src/ext/Dependency/test/WixToolsetTest.Dependency/DependencyExtensionFixture.cs
@@ -1,10 +1,13 @@
 // Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
 
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+
+[assembly: Parallelize(Scope = ExecutionScope.MethodLevel)]
+
 namespace WixToolsetTest.Dependency
 {
     using System.Linq;
     using System.Text.RegularExpressions;
-    using Microsoft.VisualStudio.TestTools.UnitTesting;
     using WixInternal.MSTestSupport;
     using WixInternal.Core.MSTestPackage;
     using WixToolset.Dependency;
diff --git a/src/ext/Dependency/test/WixToolsetTest.Dependency/WixToolsetTest.Dependency.csproj b/src/ext/Dependency/test/WixToolsetTest.Dependency/WixToolsetTest.Dependency.csproj
index 1fd46c63..7f531a22 100644
--- a/src/ext/Dependency/test/WixToolsetTest.Dependency/WixToolsetTest.Dependency.csproj
+++ b/src/ext/Dependency/test/WixToolsetTest.Dependency/WixToolsetTest.Dependency.csproj
@@ -3,7 +3,7 @@
 
 <Project Sdk="MSTest.Sdk">
   <PropertyGroup>
-    <TargetFramework>net6.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
     <IsWixMSTestProject>true</IsWixMSTestProject>
   </PropertyGroup>
 
diff --git a/src/ext/DirectX/test/WixToolsetTest.DirectX/DirectXExtensionFixture.cs b/src/ext/DirectX/test/WixToolsetTest.DirectX/DirectXExtensionFixture.cs
index dceaaec5..d4c3d9a5 100644
--- a/src/ext/DirectX/test/WixToolsetTest.DirectX/DirectXExtensionFixture.cs
+++ b/src/ext/DirectX/test/WixToolsetTest.DirectX/DirectXExtensionFixture.cs
@@ -1,9 +1,12 @@
 // Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
 
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+
+[assembly: Parallelize(Scope = ExecutionScope.MethodLevel)]
+
 namespace WixToolsetTest.DirectX
 {
     using System.Linq;
-    using Microsoft.VisualStudio.TestTools.UnitTesting;
     using WixInternal.MSTestSupport;
     using WixInternal.Core.MSTestPackage;
     using WixToolset.DirectX;
diff --git a/src/ext/DirectX/test/WixToolsetTest.DirectX/WixToolsetTest.DirectX.csproj b/src/ext/DirectX/test/WixToolsetTest.DirectX/WixToolsetTest.DirectX.csproj
index c13f3300..abbe7541 100644
--- a/src/ext/DirectX/test/WixToolsetTest.DirectX/WixToolsetTest.DirectX.csproj
+++ b/src/ext/DirectX/test/WixToolsetTest.DirectX/WixToolsetTest.DirectX.csproj
@@ -3,7 +3,7 @@
 
 <Project Sdk="MSTest.Sdk">
   <PropertyGroup>
-    <TargetFramework>net6.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
     <IsWixMSTestProject>true</IsWixMSTestProject>
   </PropertyGroup>
 
diff --git a/src/ext/Firewall/test/WixToolsetTest.Firewall/WixToolsetTest.Firewall.csproj b/src/ext/Firewall/test/WixToolsetTest.Firewall/WixToolsetTest.Firewall.csproj
index 5de88c8b..be2ddd36 100644
--- a/src/ext/Firewall/test/WixToolsetTest.Firewall/WixToolsetTest.Firewall.csproj
+++ b/src/ext/Firewall/test/WixToolsetTest.Firewall/WixToolsetTest.Firewall.csproj
@@ -3,7 +3,7 @@
 
 <Project Sdk="MSTest.Sdk">
   <PropertyGroup>
-    <TargetFramework>net6.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
     <IsWixMSTestProject>true</IsWixMSTestProject>
   </PropertyGroup>
 
diff --git a/src/ext/Http/test/WixToolsetTest.Http/WixToolsetTest.Http.csproj b/src/ext/Http/test/WixToolsetTest.Http/WixToolsetTest.Http.csproj
index d5e6c929..759787bf 100644
--- a/src/ext/Http/test/WixToolsetTest.Http/WixToolsetTest.Http.csproj
+++ b/src/ext/Http/test/WixToolsetTest.Http/WixToolsetTest.Http.csproj
@@ -3,7 +3,7 @@
 
 <Project Sdk="MSTest.Sdk">
   <PropertyGroup>
-    <TargetFramework>net6.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
     <IsWixMSTestProject>true</IsWixMSTestProject>
   </PropertyGroup>
 
diff --git a/src/ext/Iis/test/WixToolsetTest.Iis/IisExtensionFixture.cs b/src/ext/Iis/test/WixToolsetTest.Iis/IisExtensionFixture.cs
index 01a89dc0..7e4912e2 100644
--- a/src/ext/Iis/test/WixToolsetTest.Iis/IisExtensionFixture.cs
+++ b/src/ext/Iis/test/WixToolsetTest.Iis/IisExtensionFixture.cs
@@ -1,5 +1,9 @@
 // Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
 
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+
+[assembly: Parallelize(Scope = ExecutionScope.MethodLevel)]
+
 namespace WixToolsetTest.Iis
 {
     using System.Linq;
diff --git a/src/ext/Iis/test/WixToolsetTest.Iis/WixToolsetTest.Iis.csproj b/src/ext/Iis/test/WixToolsetTest.Iis/WixToolsetTest.Iis.csproj
index a0a6e043..7b9afedf 100644
--- a/src/ext/Iis/test/WixToolsetTest.Iis/WixToolsetTest.Iis.csproj
+++ b/src/ext/Iis/test/WixToolsetTest.Iis/WixToolsetTest.Iis.csproj
@@ -3,7 +3,7 @@
 
 <Project Sdk="MSTest.Sdk">
   <PropertyGroup>
-    <TargetFramework>net6.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
     <IsWixMSTestProject>true</IsWixMSTestProject>
   </PropertyGroup>
 
diff --git a/src/ext/Msmq/test/WixToolsetTest.Msmq/MsmqExtensionFixture.cs b/src/ext/Msmq/test/WixToolsetTest.Msmq/MsmqExtensionFixture.cs
index 60335b8a..95ec7874 100644
--- a/src/ext/Msmq/test/WixToolsetTest.Msmq/MsmqExtensionFixture.cs
+++ b/src/ext/Msmq/test/WixToolsetTest.Msmq/MsmqExtensionFixture.cs
@@ -1,12 +1,15 @@
 // Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
 
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+
+[assembly: Parallelize(Scope = ExecutionScope.MethodLevel)]
+
 namespace WixToolsetTest.Msmq
 {
     using System.Data;
     using System.IO;
     using System.Linq;
     using System.Xml.Linq;
-    using Microsoft.VisualStudio.TestTools.UnitTesting;
     using WixInternal.MSTestSupport;
     using WixInternal.Core.MSTestPackage;
     using WixToolset.Msmq;
diff --git a/src/ext/Msmq/test/WixToolsetTest.Msmq/WixToolsetTest.Msmq.csproj b/src/ext/Msmq/test/WixToolsetTest.Msmq/WixToolsetTest.Msmq.csproj
index a8991c2e..f41cc2e9 100644
--- a/src/ext/Msmq/test/WixToolsetTest.Msmq/WixToolsetTest.Msmq.csproj
+++ b/src/ext/Msmq/test/WixToolsetTest.Msmq/WixToolsetTest.Msmq.csproj
@@ -3,7 +3,7 @@
 
 <Project Sdk="MSTest.Sdk">
   <PropertyGroup>
-    <TargetFramework>net6.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
     <IsWixMSTestProject>true</IsWixMSTestProject>
   </PropertyGroup>
 
diff --git a/src/ext/NetFx/netcoresearch/netcoresearch.vcxproj b/src/ext/NetFx/netcoresearch/netcoresearch.vcxproj
index a73192d0..b6e193dc 100644
--- a/src/ext/NetFx/netcoresearch/netcoresearch.vcxproj
+++ b/src/ext/NetFx/netcoresearch/netcoresearch.vcxproj
@@ -42,8 +42,8 @@
   <PropertyGroup>
     <NetHostPlatform>$(Platform)</NetHostPlatform>
     <NetHostPlatform Condition=" '$(NetHostPlatform)'=='Win32' ">x86</NetHostPlatform>
-    <NetHostPath>..\..\..\..\packages\runtime.win-$(NetHostPlatform).Microsoft.NETCore.DotNetAppHost.6.0.4\runtimes\win-$(NetHostPlatform)\native\</NetHostPath>
-    <HostfxrPath>..\..\..\..\packages\runtime.win-$(NetHostPlatform).Microsoft.NETCore.DotNetHostResolver.6.0.4\runtimes\win-$(NetHostPlatform)\native\</HostfxrPath>
+    <NetHostPath>..\..\..\..\packages\runtime.win-$(NetHostPlatform).Microsoft.NETCore.DotNetAppHost.8.0.21\runtimes\win-$(NetHostPlatform)\native\</NetHostPath>
+    <HostfxrPath>..\..\..\..\packages\runtime.win-$(NetHostPlatform).Microsoft.NETCore.DotNetHostResolver.8.0.21\runtimes\win-$(NetHostPlatform)\native\</HostfxrPath>
     <ProjectAdditionalIncludeDirectories>$(NetHostPath)</ProjectAdditionalIncludeDirectories>
   </PropertyGroup>
 
diff --git a/src/ext/NetFx/netcoresearch/packages.config b/src/ext/NetFx/netcoresearch/packages.config
index ad26db1c..235e6e08 100644
--- a/src/ext/NetFx/netcoresearch/packages.config
+++ b/src/ext/NetFx/netcoresearch/packages.config
@@ -1,9 +1,9 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="runtime.win-arm64.Microsoft.NETCore.DotNetAppHost" version="6.0.4" targetFramework="native" />
-  <package id="runtime.win-x64.Microsoft.NETCore.DotNetAppHost" version="6.0.4" targetFramework="native" />
-  <package id="runtime.win-x86.Microsoft.NETCore.DotNetAppHost" version="6.0.4" targetFramework="native" />
-  <package id="runtime.win-arm64.Microsoft.NETCore.DotNetHostResolver" version="6.0.4" targetFramework="native" />
-  <package id="runtime.win-x64.Microsoft.NETCore.DotNetHostResolver" version="6.0.4" targetFramework="native" />
-  <package id="runtime.win-x86.Microsoft.NETCore.DotNetHostResolver" version="6.0.4" targetFramework="native" />
-</packages>
\ No newline at end of file
+  <package id="runtime.win-arm64.Microsoft.NETCore.DotNetAppHost" version="8.0.21" targetFramework="native" />
+  <package id="runtime.win-x64.Microsoft.NETCore.DotNetAppHost" version="8.0.21" targetFramework="native" />
+  <package id="runtime.win-x86.Microsoft.NETCore.DotNetAppHost" version="8.0.21" targetFramework="native" />
+  <package id="runtime.win-arm64.Microsoft.NETCore.DotNetHostResolver" version="8.0.21" targetFramework="native" />
+  <package id="runtime.win-x64.Microsoft.NETCore.DotNetHostResolver" version="8.0.21" targetFramework="native" />
+  <package id="runtime.win-x86.Microsoft.NETCore.DotNetHostResolver" version="8.0.21" targetFramework="native" />
+</packages>
diff --git a/src/ext/NetFx/test/WixToolsetTest.Netfx/WixToolsetTest.Netfx.csproj b/src/ext/NetFx/test/WixToolsetTest.Netfx/WixToolsetTest.Netfx.csproj
index bdca49e6..c7f01717 100644
--- a/src/ext/NetFx/test/WixToolsetTest.Netfx/WixToolsetTest.Netfx.csproj
+++ b/src/ext/NetFx/test/WixToolsetTest.Netfx/WixToolsetTest.Netfx.csproj
@@ -3,7 +3,7 @@
 
 <Project Sdk="MSTest.Sdk">
   <PropertyGroup>
-    <TargetFramework>net6.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
     <IsWixMSTestProject>true</IsWixMSTestProject>
   </PropertyGroup>
 
diff --git a/src/ext/PowerShell/test/WixToolsetTest.PowerShell/PowerShellExtensionFixture.cs b/src/ext/PowerShell/test/WixToolsetTest.PowerShell/PowerShellExtensionFixture.cs
index a1dc3282..31090bf6 100644
--- a/src/ext/PowerShell/test/WixToolsetTest.PowerShell/PowerShellExtensionFixture.cs
+++ b/src/ext/PowerShell/test/WixToolsetTest.PowerShell/PowerShellExtensionFixture.cs
@@ -1,8 +1,11 @@
 // Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
 
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+
+[assembly: Parallelize(Scope = ExecutionScope.MethodLevel)]
+
 namespace WixToolsetTest.PowerShell
 {
-    using Microsoft.VisualStudio.TestTools.UnitTesting;
     using WixInternal.MSTestSupport;
     using WixInternal.Core.MSTestPackage;
     using WixToolset.PowerShell;
diff --git a/src/ext/PowerShell/test/WixToolsetTest.PowerShell/WixToolsetTest.Powershell.csproj b/src/ext/PowerShell/test/WixToolsetTest.PowerShell/WixToolsetTest.Powershell.csproj
index cff13cb7..9f46f94e 100644
--- a/src/ext/PowerShell/test/WixToolsetTest.PowerShell/WixToolsetTest.Powershell.csproj
+++ b/src/ext/PowerShell/test/WixToolsetTest.PowerShell/WixToolsetTest.Powershell.csproj
@@ -3,7 +3,7 @@
 
 <Project Sdk="MSTest.Sdk">
   <PropertyGroup>
-    <TargetFramework>net6.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
     <IsWixMSTestProject>true</IsWixMSTestProject>
   </PropertyGroup>
 
diff --git a/src/ext/Sql/test/WixToolsetTest.Sql/SqlExtensionFixture.cs b/src/ext/Sql/test/WixToolsetTest.Sql/SqlExtensionFixture.cs
index 14ca14c3..0133d082 100644
--- a/src/ext/Sql/test/WixToolsetTest.Sql/SqlExtensionFixture.cs
+++ b/src/ext/Sql/test/WixToolsetTest.Sql/SqlExtensionFixture.cs
@@ -1,9 +1,12 @@
 // Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
 
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+
+[assembly: Parallelize(Scope = ExecutionScope.MethodLevel)]
+
 namespace WixToolsetTest.Sql
 {
     using System.Linq;
-    using Microsoft.VisualStudio.TestTools.UnitTesting;
     using WixInternal.MSTestSupport;
     using WixInternal.Core.MSTestPackage;
     using WixToolset.Sql;
diff --git a/src/ext/Sql/test/WixToolsetTest.Sql/WixToolsetTest.Sql.csproj b/src/ext/Sql/test/WixToolsetTest.Sql/WixToolsetTest.Sql.csproj
index 62345258..f417f489 100644
--- a/src/ext/Sql/test/WixToolsetTest.Sql/WixToolsetTest.Sql.csproj
+++ b/src/ext/Sql/test/WixToolsetTest.Sql/WixToolsetTest.Sql.csproj
@@ -3,7 +3,7 @@
 
 <Project Sdk="MSTest.Sdk">
   <PropertyGroup>
-    <TargetFramework>net6.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
     <IsWixMSTestProject>true</IsWixMSTestProject>
   </PropertyGroup>
 
diff --git a/src/ext/UI/test/WixToolsetTest.UI/WixToolsetTest.UI.csproj b/src/ext/UI/test/WixToolsetTest.UI/WixToolsetTest.UI.csproj
index 132920c5..fd2a4e69 100644
--- a/src/ext/UI/test/WixToolsetTest.UI/WixToolsetTest.UI.csproj
+++ b/src/ext/UI/test/WixToolsetTest.UI/WixToolsetTest.UI.csproj
@@ -3,7 +3,7 @@
 
 <Project Sdk="MSTest.Sdk">
   <PropertyGroup>
-    <TargetFramework>net6.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
     <IsWixMSTestProject>true</IsWixMSTestProject>
   </PropertyGroup>
 
diff --git a/src/ext/Util/test/WixToolsetTest.Util/UtilExtensionFixture.cs b/src/ext/Util/test/WixToolsetTest.Util/UtilExtensionFixture.cs
index bb00717f..b29607c7 100644
--- a/src/ext/Util/test/WixToolsetTest.Util/UtilExtensionFixture.cs
+++ b/src/ext/Util/test/WixToolsetTest.Util/UtilExtensionFixture.cs
@@ -377,7 +377,7 @@ namespace WixToolsetTest.Util
                 extractResult.AssertSuccess();
 
                 var bootstrapperExtensionDatas = extractResult.SelectBootstrapperExtensionDataNodes("/be:BootstrapperExtensionData/be:BootstrapperExtension[@Id='Wix4UtilBootstrapperExtension_X86']");
-                Assert.AreEqual(1, bootstrapperExtensionDatas.Count);
+                Assert.HasCount(1, bootstrapperExtensionDatas);
                 Assert.AreEqual("<BootstrapperExtension Id='Wix4UtilBootstrapperExtension_X86'>" +
                     "<WixWindowsFeatureSearch Id='DetectSHA2SupportId' Type='sha2CodeSigning' />" +
                     "</BootstrapperExtension>", bootstrapperExtensionDatas[0].GetTestXml());
diff --git a/src/ext/Util/test/WixToolsetTest.Util/WixToolsetTest.Util.csproj b/src/ext/Util/test/WixToolsetTest.Util/WixToolsetTest.Util.csproj
index 4036c3ab..b5ea9d2e 100644
--- a/src/ext/Util/test/WixToolsetTest.Util/WixToolsetTest.Util.csproj
+++ b/src/ext/Util/test/WixToolsetTest.Util/WixToolsetTest.Util.csproj
@@ -3,7 +3,7 @@
 
 <Project Sdk="MSTest.Sdk">
   <PropertyGroup>
-    <TargetFramework>net6.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
     <IsWixMSTestProject>true</IsWixMSTestProject>
   </PropertyGroup>
 
diff --git a/src/ext/VisualStudio/test/WixToolsetTest.VisualStudio/VisualStudioExtensionFixture.cs b/src/ext/VisualStudio/test/WixToolsetTest.VisualStudio/VisualStudioExtensionFixture.cs
index 992ac953..361f5274 100644
--- a/src/ext/VisualStudio/test/WixToolsetTest.VisualStudio/VisualStudioExtensionFixture.cs
+++ b/src/ext/VisualStudio/test/WixToolsetTest.VisualStudio/VisualStudioExtensionFixture.cs
@@ -1,8 +1,11 @@
 // Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
 
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+
+[assembly: Parallelize(Scope = ExecutionScope.MethodLevel)]
+
 namespace WixToolsetTest.VisualStudio
 {
-    using Microsoft.VisualStudio.TestTools.UnitTesting;
     using WixInternal.MSTestSupport;
     using WixInternal.Core.MSTestPackage;
     using WixToolset.VisualStudio;
diff --git a/src/ext/VisualStudio/test/WixToolsetTest.VisualStudio/WixToolsetTest.VisualStudio.csproj b/src/ext/VisualStudio/test/WixToolsetTest.VisualStudio/WixToolsetTest.VisualStudio.csproj
index 9cfb6867..8b8f6ad9 100644
--- a/src/ext/VisualStudio/test/WixToolsetTest.VisualStudio/WixToolsetTest.VisualStudio.csproj
+++ b/src/ext/VisualStudio/test/WixToolsetTest.VisualStudio/WixToolsetTest.VisualStudio.csproj
@@ -3,7 +3,7 @@
 
 <Project Sdk="MSTest.Sdk">
   <PropertyGroup>
-    <TargetFramework>net6.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
     <IsWixMSTestProject>true</IsWixMSTestProject>
   </PropertyGroup>