fix: add project dependencies and prevent parallel builds for benchmarks and integration tests

Author: dborgards

CycloneDX.MSBuild.sln

@@ -14,6 +14,10 @@ EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "CycloneDX.MSBuild.Benchmarks", "tests\CycloneDX.MSBuild.Benchmarks\CycloneDX.MSBuild.Benchmarks.csproj", "{B8C9D0E1-F2A3-4B5C-4D5E-7F8A9B0C1D2E}"
 EndProject
 Global
+	GlobalSection(ProjectDependencies) = postSolution
+		{A7B8C9D0-E1F2-4A5B-3C4D-6E7F8A9B0C1D}.0 = {C3D4E5F6-A7B8-4C5D-0E1F-2A3B4C5D6E7F}
+		{B8C9D0E1-F2A3-4B5C-4D5E-7F8A9B0C1D2E}.0 = {C3D4E5F6-A7B8-4C5D-0E1F-2A3B4C5D6E7F}
+	EndGlobalSection
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
 		Release|Any CPU = Release|Any CPU

tests/CycloneDX.MSBuild.Benchmarks/CycloneDX.MSBuild.Benchmarks.csproj

@@ -14,4 +14,14 @@
     <PackageReference Include="BenchmarkDotNet" Version="0.14.0" />
   </ItemGroup>
 
+  <ItemGroup>
+    <!-- Reference CycloneDX.MSBuild first to ensure it's built before this project -->
+    <!-- This prevents parallel builds of the shared dependency that cause file locking -->
+    <ProjectReference Include="../../src/CycloneDX.MSBuild/CycloneDX.MSBuild.csproj">
+      <ReferenceOutputAssembly>false</ReferenceOutputAssembly>
+      <BuildInParallel>false</BuildInParallel>
+      <Properties>GeneratePackageOnBuild=false</Properties>
+    </ProjectReference>
+  </ItemGroup>
+
 </Project>

tests/Directory.Build.props

@@ -10,4 +10,11 @@
     <!-- CA1062: Validate arguments of public methods - Tests don't need null checks -->
     <NoWarn>$(NoWarn);CA1707;CA1305;CA2201;CA1062</NoWarn>
   </PropertyGroup>
+
+  <PropertyGroup>
+    <!-- Use project-specific intermediate output directories to prevent parallel build conflicts -->
+    <!-- This ensures each project has its own obj/ directory even when building shared dependencies -->
+    <BaseIntermediateOutputPath>$(MSBuildProjectDirectory)/obj/$(MSBuildProjectName)/</BaseIntermediateOutputPath>
+    <IntermediateOutputPath>$(BaseIntermediateOutputPath)$(Configuration)/</IntermediateOutputPath>
+  </PropertyGroup>
 </Project>