Error MSB3073 when using a higher minimum version than 10.0.10240

I am using Unity 2018 and VS2017.

I compiled my project for UWP, with a .net back end. It works fine.

I added a NavigationView to a page, the project forces you to update the minimum version to use it, needs to be 10.0.1809. When I do that, the project won't compile anymore.

It fails with error MSB3073 on the assembly converter:

Code (CSharp):

1. 1>  Running AssemblyConverter...
2. 1>  Failed to fix references for method System.Boolean UnityEngine.Experimental.UIElements.UxmlTraits/<GetAllAttributeDescriptionForType>d__10::MoveNext()
3. 1>  Failed to fix references for type UnityEngine.Experimental.UIElements.UxmlTraits/<GetAllAttributeDescriptionForType>d__10
4. 1>  System.Exception: Failed to resolve System.Reflection.BindingFlags
5. 1>     at Unity.ModuleContext.Retarget(TypeReference type, GenericContext context)
6. 1>     at Unity.ModuleContext.Retarget(MethodReference method, GenericContext context)
7. 1>     at Unity.FixReferencesStep.Visit(MethodDefinition method, GenericContext context)
8. 1>     at Unity.FixReferencesStep.Visit(TypeDefinition type)
9. 1>     at Unity.TypeDefinitionDispatcher.DispatchType(TypeDefinition type)
10. 1>     at Unity.TypeDefinitionDispatcher.DispatchType(TypeDefinition type)
11. 1>     at Unity.TypeDefinitionDispatcher..ctor(ModuleDefinition module, ITypeDefinitionVisitor visitor)
12. 1>     at Unity.FixReferencesStep.ProcessModule()
13. 1>     at Unity.ModuleStep.Execute()
14. 1>     at Unity.FixReferencesStep.Execute()
15. 1>     at Unity.Step.Execute(OperationContext operationContext, IStepContext previousStepContext)
16. 1>     at Unity.Operation.Execute()
17. 1>     at Unity.Program.Main(String[] args)
18. 1>C:\projects\Unity\UnityChessGame\UWP\UnityChessGame\UnityChessGame.csproj(462,5): error MSB3073: The command ""C:\projects\Unity\UnityChessGame\UWP\Unity\Tools\AssemblyConverter.exe" -platform=uap -bits=64 -configuration=Debug -removeDebuggableAttribute=False -uwpsdk=10.0.17763.0 -path="." -path="C:\Program Files\Unity\Hub\Editor\2018.4.17f1\Editor\Data\PlaybackEngines\MetroSupport\Players\UAP\dotnet\x64\Debug" -workingDir="C:\projects\Unity\UnityChessGame\UWP\UnityChessGame\\" "@C:\projects\Unity\UnityChessGame\UWP\UnityChessGame\AssemblyConverterArgs.txt"" exited with code 1.

I can find no information about this error, any help would be greatly appreciated.

 

Well I can get it to compile for Creators Update (15063) if I update the nuget package for Microsoft.NETCore.UniversalWindowsPlatform to 6.210. Any version above that and it blows up with a different error now:

Code (CSharp):

1. 1>  Running AssemblyConverter...
2. 1>  System.InvalidOperationException: Sequence contains more than one matching element
3. 1>     at System.Linq.Enumerable.Single[TSource](IEnumerable`1 source, Func`2 predicate)
4. 1>     at Unity.ModuleContext.GetCorLibMethod(TypeReference type, Func`2 predicate)
5. 1>     at Unity.ModuleContext.GetCorLibMethod(String typeFullName, String methodName)
6. 1>     at Unity.AddMethodUtilityClassStep.WSA_AddInvokeDefaultConstructorMethod(TypeDefinition type)
7. 1>     at Unity.AddMethodUtilityClassStep.ProcessModule()
8. 1>     at Unity.ModuleStep.Execute()
9. 1>     at Unity.Step.Execute(OperationContext operationContext, IStepContext previousStepContext)
10. 1>     at Unity.Operation.Execute()
11. 1>     at Unity.Program.Main(String[] args)
12. 1>C:\projects\Unity\UnityChessGame\UWP\UnityChessGame\UnityChessGame.csproj(467,5): error MSB3073: The command ""C:\projects\Unity\UnityChessGame\UWP\Unity\Tools\AssemblyConverter.exe" -platform=uap -bits=64 -configuration=Debug -removeDebuggableAttribute=False -uwpsdk=10.0.17763.0 -path="." -path="C:\Program Files\Unity\Hub\Editor\2018.4.17f1\Editor\Data\PlaybackEngines\MetroSupport\Players\UAP\dotnet\x64\Debug" -workingDir="C:\projects\Unity\UnityChessGame\UWP\UnityChessGame\\" "@C:\projects\Unity\UnityChessGame\UWP\UnityChessGame\AssemblyConverterArgs.txt"" exited with code 1.

 

I can't install Mysql.Data since it requires NetStandard, which requires the Fall Creators Update. I can't reference a PCL or Net Standard library either unless I can figure out how to update the min version.

 

Using a really old version of the SQL library so I can call my DB via Mysql.Data.RT.

Got around the NavigationView version requirement by using it directly: Windows10FallCreatorsUpdate:NavigationView

I can't use a lot of libraries because I can't up my Windows Minimum Version any higher, is there really no one on this forum who is using UWP with Unity?

 

Thank you so much, that worked! I lowered Microsoft.NETCore.UniversalWindowsPlatform back to 5.4.4 and followed instructions in that thread to edit the .csproj file. Only other thing I had to do was run "Install-Package System.Reflection.TypeExtensions -Version 4.0.0"

Can this info please be added to the documentation for UWP? I know C# support is deprecated but it is still in Unity LTS. And everyone has to update the minimum version to be able to push a project to the store.

My google skills are usually better than that, I don't know how I missed that thread.