Pass TargetFramework to JI tool projects

Author: pjcollins

build-tools/automation/azure-pipelines.yaml

@@ -48,7 +48,7 @@ variables:
   InstallerArtifactName: installers
   TestAssembliesArtifactName: test-assemblies
   NUnitConsoleVersion: 3.9.0
-  DotNetCoreVersion: 3.1.200
+  DotNetCoreVersion: 3.1.100
   HostedMacMojave: Hosted Mac Internal Mojave
   HostedMac: Hosted Mac Internal
   HostedWinVS2019: Hosted Windows 2019 with VS2019

src/Mono.Android/Mono.Android.csproj

@@ -335,8 +335,9 @@
     <ProjectReference Include="..\..\build-tools\api-merge\api-merge.csproj" ReferenceOutputAssembly="false" />
     <ProjectReference Include="..\..\build-tools\api-xml-adjuster\api-xml-adjuster.csproj" ReferenceOutputAssembly="false" />
     <ProjectReference Include="..\..\build-tools\jnienv-gen\jnienv-gen.csproj" ReferenceOutputAssembly="false" />
-    <ProjectReference Include="..\..\external\Java.Interop\tools\generator\generator.csproj" ReferenceOutputAssembly="false" SkipGetTargetFrameworkProperties="true" />
-    <ProjectReference Include="..\..\external\Java.Interop\tools\jcw-gen\jcw-gen.csproj" ReferenceOutputAssembly="false" SkipGetTargetFrameworkProperties="true" />
+    <!-- Explicitly pass the target framework of the project so we don't have conflicts with the multiple targets in this file. -->
+    <ProjectReference Include="..\..\external\Java.Interop\tools\generator\generator.csproj" ReferenceOutputAssembly="false" SkipGetTargetFrameworkProperties="true" AdditionalProperties="TargetFramework=net472"/>
+    <ProjectReference Include="..\..\external\Java.Interop\tools\jcw-gen\jcw-gen.csproj" ReferenceOutputAssembly="false" SkipGetTargetFrameworkProperties="true" AdditionalProperties="TargetFramework=net472" />
     <ProjectReference Include="..\..\src\java-runtime\java-runtime.csproj" ReferenceOutputAssembly="false" />
   </ItemGroup>