duplicate 'global::System.Runtime.Versioning.TargetFrameworkAttribute' when launching run-windows

[arsenikstiger]

Problem Description

I created a project by following instructions on get-started for react-native for windows, and choosed C#.
I created the project today, so I use the last version.
The 1st start of the project was good.

But as soon as I modifiy the .NET project to include my own code and nuget dependencies (PInvoke), I encounter this problem when building my project with react-native run-windows command:

Build failed with message 9:6>[project-path]\node_modules\react-native-windows\Microsoft.ReactNative.Managed.CodeGen\build\x64\Debug\Microsoft.ReactNative.Managed.CodeGen\netcoreapp3.1\win-x64.NETCoreApp,Version=v3.1.AssemblyAttributes.cs(4,12): error CS0579: Duplicate 'global::System.Runtime.Versioning.TargetFrameworkAttribute' [[project-path]\node_modules\react-native-windows\Microsoft.ReactNative.Managed.CodeGen\Microsoft.ReactNative.Managed.CodeGen.csproj]. Check your build configuration.

I tried to clean the project from VS2022, but no results.

Steps To Reproduce

1. Create react-native for windows project with C#
2. Open project sln with Visual Studio 2022
3. Add some code and include a nuget dependency (PInvoke in my case)
4. Run npx react-native run-windows

Expected Results

It has to build and launch my project !

CLI version

8.0.2

Environment

Languages:
    Java: javac 17 - C:\Program Files\Eclipse Foundation\jdk-17.0.0.35-hotspot\bin\javac.EXE
  npmPackages:
    @react-native-community/cli: Not Found
    react: 18.0.0 => 18.0.0
    react-native: 0.69.0 => 0.69.0
    react-native-windows: ^0.69.1 => 0.69.1
  npmGlobalPackages:
    *react-native*: Not Found

Target Platform Version

10.0.19041

Target Device(s)

Desktop

Visual Studio Version

Visual Studio 2022

Build Configuration

Debug

Snack, code example, screenshot, or link to a repository

No response

[arsenikstiger]

I tried to pass experimentalNuGetDependency to true, by following this tutorial
This bug doesn't occur anymore.
So I think this can be marked as a workaround.

[chrisglein]

I tried to pass experimentalNuGetDependency to true, by following this tutorial This bug doesn't occur anymore. So I think this can be marked as a workaround.

Glad you're unblocked.
Requiring that you use the experimental nuget and not be able to build from source may not work for everyone. So there's still a gap here.

[JunielKatarn]

This could be related to RNW's enablement of PackageReference for C++ NuGet dependencies.
I will investigate in depth tomorrow.

[JunielKatarn]

Hi @arsenikstiger.

Can you please specify what PInvoke NuGet package did you add?
There doesn't seem to be a package with that exact name in nuget.org.

[JunielKatarn]

Following the mentioned steps but adding NuGet dependency PInvoke.Windows.Core, the issue does not reproduce.

[jmurp]

I'm also trying to create a react-native windows with c#. Just like the OP, if I go through the steps on the getting started page and never open the visual studio solution, the app starts. However, if I open the visual studio solution (I did NOT change any of the code) and try to run "npx react-native run-windows", I also get the following:

× Building Solution: C:[path to project]\node_modules\react-native-window...
× Build failed with message C:[path to project]\node_modules\react-native-windows\Microsoft.ReactNative.Managed.CodeGen\build\x64\Debug\Microsoft.ReactNative.Managed.CodeGen\netcoreapp3.1\win-x64.NETCoreApp,Version=v3.1.AssemblyAttributes.cs(4,12): error CS0579: Duplicate 'global::System.Runtime.Versioning.TargetFrameworkAttribute' attribute [C:[path to project]\node_modules\react-native-windows\Microsoft.ReactNative.Managed.CodeGen\Microsoft.ReactNative.Managed.CodeGen.csproj]. Check your build configuration.

In addition, this sequence:

npx react-native init --template react-native@^0.69.0
cd projectName
npx react-native-windows-init --overwrite --language cs
npx react-native autolink-windows (this one says that it doesn't need to do any linking)
(opening the VS solution, setting the configuration to debug x64)
yarn start
start without debugging from VS

gives the following build failed error from visual studio

Error Could not write lines to file "build\x64\Debug\Microsoft.ReactNative.Managed.CodeGen\netcoreapp3.1\win-x64\Microsoft.ReactNative.Managed.CodeGen.GeneratedMSBuildEditorConfig.editorconfig". Could not find a part of the path '[path to project]\node_modules\react-native-windows\Microsoft.ReactNative.Managed.CodeGen\build\x64\Debug\Microsoft.ReactNative.Managed.CodeGen\netcoreapp3.1\win-x64\Microsoft.ReactNative.Managed.CodeGen.GeneratedMSBuildEditorConfig.editorconfig'. [name of project]

My version info:

windows 10.0.19043

Microsoft Visual Studio Community 2019
Version 16.11.17
VisualStudio.16.Release/16.11.17+32630.194
Microsoft .NET Framework
Version 4.8.04084
Installed Version: Community
Visual C++ 2019 00435-00000-00000-AA918
Microsoft Visual C++ 2019

react-native - 0.69.0
node - v14.18.1

EDIT - The 1st and 2nd issue I printed above were fixed by moving my project location closer to root. I had a hunch that the path was getting too long. I noted the "enable long path support" in the "likely out of date" instruction before I started and looked this up and changed a value in the registry. Did I not do this correctly? I have no way of knowing. Can someone tell me a workaround or the correct way to 'enable long path support', I'd like to not have to name my projects without vowels and place them right on the C drive, lol.

[tero-paananen]

I want to upgrade my app from 0.65 to 0.69 and i always do working Hello World app before upgrade to see all needed changes.

I tried to build React Native Windows Hello World app on 0.69.3 and i get about the same build errors.

Steps to create C# HelloWorld 0.69.3. I ran these command in root to prevent paths to get too long.

npx react-native init Hello069 --template react-native@0.69.3
cd Hello069
yarn install
npx react-native-windows-init --overwrite --language cs --version 0.69.4

I opened solution file by Visual Studio 2019 (16.11.6) and tried x64 debug build (Build->Build solution).

I get assembly build errors:

8>C:\Users\tepaa\Hello069\node_modules\react-native-windows\Microsoft.ReactNative.Managed.CodeGen\build\x64\Debug\Microsoft.ReactNative.Managed.CodeGen\netcoreapp3.1\win-x64\.NETCoreApp,Version=v3.1.AssemblyAttributes.cs(4,12,4,70): error CS0579: Duplicate 'global::System.Runtime.Versioning.TargetFrameworkAttribute' attribute
8>C:\Users\tepaa\Hello069\node_modules\react-native-windows\Microsoft.ReactNative.Managed.CodeGen\build\x64\Debug\Microsoft.ReactNative.Managed.CodeGen\netcoreapp3.1\win-x64\Microsoft.ReactNative.Managed.CodeGen.AssemblyInfo.cs(14,12,14,54): error CS0579: Duplicate 'System.Reflection.AssemblyCompanyAttribute' attribute
8>C:\Users\tepaa\Hello069\node_modules\react-native-windows\Microsoft.ReactNative.Managed.CodeGen\build\x64\Debug\Microsoft.ReactNative.Managed.CodeGen\netcoreapp3.1\win-x64\Microsoft.ReactNative.Managed.CodeGen.AssemblyInfo.cs(15,12,15,60): error CS0579: Duplicate 'System.Reflection.AssemblyConfigurationAttribute' attribute
8>C:\Users\tepaa\Hello069\node_modules\react-native-windows\Microsoft.ReactNative.Managed.CodeGen\build\x64\Debug\Microsoft.ReactNative.Managed.CodeGen\netcoreapp3.1\win-x64\Microsoft.ReactNative.Managed.CodeGen.AssemblyInfo.cs(16,12,16,58): error CS0579: Duplicate 'System.Reflection.AssemblyFileVersionAttribute' attribute
8>C:\Users\tepaa\Hello069\node_modules\react-native-windows\Microsoft.ReactNative.Managed.CodeGen\build\x64\Debug\Microsoft.ReactNative.Managed.CodeGen\netcoreapp3.1\win-x64\Microsoft.ReactNative.Managed.CodeGen.AssemblyInfo.cs(17,12,17,67): error CS0579: Duplicate 'System.Reflection.AssemblyInformationalVersionAttribute' attribute
8>C:\Users\tepaa\Hello069\node_modules\react-native-windows\Microsoft.ReactNative.Managed.CodeGen\build\x64\Debug\Microsoft.ReactNative.Managed.CodeGen\netcoreapp3.1\win-x64\Microsoft.ReactNative.Managed.CodeGen.AssemblyInfo.cs(18,12,18,54): error CS0579: Duplicate 'System.Reflection.AssemblyProductAttribute' attribute
8>C:\Users\tepaa\Hello069\node_modules\react-native-windows\Microsoft.ReactNative.Managed.CodeGen\build\x64\Debug\Microsoft.ReactNative.Managed.CodeGen\netcoreapp3.1\win-x64\Microsoft.ReactNative.Managed.CodeGen.AssemblyInfo.cs(19,12,19,52): error CS0579: Duplicate 'System.Reflection.AssemblyTitleAttribute' attribute
8>C:\Users\tepaa\Hello069\node_modules\react-native-windows\Microsoft.ReactNative.Managed.CodeGen\build\x64\Debug\Microsoft.ReactNative.Managed.CodeGen\netcoreapp3.1\win-x64\Microsoft.ReactNative.Managed.CodeGen.AssemblyInfo.cs(20,12,20,54): error CS0579: Duplicate 'System.Reflection.AssemblyVersionAttribute' attribute

Warning

Severity	Code	Description	Project	File	Line	Suppression State
Warning		The project 'Microsoft.ReactNative' cannot be referenced. The referenced project is targeted to a different framework family (native)	Hello069			

System:
    OS: Windows 10 10.0.19044
    CPU: (12) x64 Intel(R) Core(TM) i9-8950HK CPU @ 2.90GHz
    Memory: 21.35 GB / 31.90 GB
  Binaries:
    Node: 14.20.0 - C:\Program Files\nodejs\node.EXE
    Yarn: 1.22.5 - C:\Program Files (x86)\Yarn\bin\yarn.CMD
    npm: 8.11.0 - C:\Program Files\nodejs\npm.CMD
    Watchman: Not Found
  SDKs:
    Android SDK: Not Found
    Windows SDK:
      AllowDevelopmentWithoutDevLicense: Enabled
      AllowAllTrustedApps: Enabled
      Versions: 10.0.18362.0, 10.0.19041.0
  IDEs:
    Android Studio: Not Found
    Visual Studio: 16.11.31829.152 (Visual Studio Community 2019)
  Languages:
    Java: Not Found
  npmPackages:
    @react-native-community/cli: Not Found
    react: Not Found
    react-native: 0.69.3 => 0.69.3
    react-native-windows: 0.69.4 => 0.69.4
  npmGlobalPackages:
    *react-native*: Not Found

[tero-paananen]

RNW 0.68 C# HelloWorld builds without errors

npx react-native init Hello068 --template react-native@0.68.2
cd Hello068
yarn install
npx react-native-windows-init --overwrite --language cs --version 0.68.12