Fix net48 tests in VS 2022 to not use AppDomain

A custom .runsettings file is required for this with MSTest 3.

tests/Directory.Build.props

@@ -9,6 +9,7 @@
 		<NoWarn>1701;1702;1705;SA0001;SA1413</NoWarn>
 		<AssemblyOriginatorKeyFile/>
 		<CodeAnalysisRuleSet>..\..\src\Analyzers.ruleset</CodeAnalysisRuleSet>
+		<RunSettingsFilePath>$(MSBuildThisFileDirectory)Directory.runsettings</RunSettingsFilePath>
 
 		<!--We can't use MSTest Runner until our build.ps1 is updated to use the .exe outputs.
 		https://devblogs.microsoft.com/dotnet/introducing-ms-test-runner/ -->

tests/Directory.runsettings

@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="utf-8"?>
+<RunSettings>
+	<RunConfiguration>
+		<!-- https://superuser.com/a/1376408/430448 -->
+		<!-- https://docs.microsoft.com/en-us/visualstudio/test/configure-unit-tests-by-using-a-dot-runsettings-file?view=vs-2019#elements-of-a-runsettings-file -->
+		<ResultsDirectory>..\TestResults</ResultsDirectory>
+		<TargetPlatform>x64</TargetPlatform>
+		<!-- https://github.com/microsoft/vstest-docs/blob/main/docs/configure.md -->
+		<!-- Also, required for MSTest 3 on .NET Framework. https://github.com/microsoft/testfx/issues/1437 -->
+		<DisableAppDomain>true</DisableAppDomain>
+	</RunConfiguration>
+
+	<MSTest>
+		<DeploymentEnabled>False</DeploymentEnabled>
+	</MSTest>
+</RunSettings>

tests/Menees.Analyzers.Test/Menees.Analyzers.Test.csproj

@@ -10,6 +10,7 @@
 
 	<ItemGroup>
 		<None Include="..\Directory.Build.props" Link="Directory.Build.props" />
+		<None Include="..\Directory.runsettings" Link="Directory.runsettings" />
 	</ItemGroup>
 
 	<ItemGroup>