Visual studio conflicts between Reference and Platform

12
votes

Since I upgraded my target framework to 4.6.1 for a C# ASP.Net project I get a lot of conflict warnings during build. 50+ Messages like:

Consider app.config remapping of assembly "System.Runtime.InteropServices.RuntimeInformation, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" from Version "0.0.0.0" [] to Version "4.0.2.0" [C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\MSBuild\Microsoft\Microsoft.NET.Build.Extensions\net461\lib\System.Runtime.InteropServices.RuntimeInformation.dll] to solve conflict and get rid of warning.

They are all related to .NET System library. I could of course remap all references but somehow I think that is not the proper solution. If I rebuild with output 'detailed', I get more information:

C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\MSBuild\Microsoft\Microsoft.NET.Build.Extensions\Microsoft.NET.Build.Extensions.ConflictResolution.targets(33,5): message NETSDK1041: Encountered conflict between 'Reference:System.Runtime.InteropServices.RuntimeInformation, Version=4.0.1.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL' and 'Reference:System.Runtime.InteropServices.RuntimeInformation'. NETSDK1033: Choosing 'Reference:System.Runtime.InteropServices.RuntimeInformation' because AssemblyVersion '4.0.2.0' is greater than '4.0.1.0'.

Somehow there seems to be a version conflict between a .NET framework in the folder C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework.NETFramework\v4.6.1 and C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\MSBuild\Microsoft\Microsoft.NET.Build.Extensions\net461\lib.

I don't know how to make sure it uses references from the same place. Can anyone help?

3
.netvisual-studiomsbuild
Can you re-install all NuGet packages (Update-Package -Reinstall in the Nuget command window) and then double-click assembly binding warnings if one suggests to add binding redirects (it will open a dialog that will ask for your permission to automatically edit the web.config)? – Martin Ullrich
I did and did not get any assembly binding warning :( – Peter de Bruijn

3 Answers

6
votes

Visual studio conflicts between Reference and Platform

It seems because that:

This is due to the injected support for NETStandard 2.0. We inject new assemblies into NET 4.6.1 and later desktop projects in order to add support for netstandard2.0. We do this in targets now instead of packages because its no longer a requirement to reference a package to build a netstandard library. This injection happens whenever we see a netstandard1.5 or greater library referenced (see dotnet/sdk#1386).

To resolve this issue, you could add binding redirect to those reference.

Check System.Net.Http v4.2.0.0 being copied/loaded from MSBuild tooling for some more details.

Hope this helps.

0
votes

One of my co-worker the upgrade the .Net version to 4.6.1 . After updating my git locally, I got the same issue. I got "Consider app.config remapping of assembly" for many .dll

I first wanted to update my 4.6.1 framework but I got this message : ".NET Framework 4.6.1 ou une mise à jour ultérieure est déjà installé sur cet ordinateur."

After reading the related link : https://docs.microsoft.com/en-us/dotnet/framework/install/troubleshoot-blocked-installations-and-uninstallations

It seems that there is a "link" between on sdk and the previous ones.

I install then the most recent version of the .NET SDK (4.8) : ndp48-devpack-enu.exe.

After the end of installation I rebuild my project and it is working

+

0
votes

Setting NUGET_PACKAGES variable did not solve my problem. Also, I noticed that the nuget packages are available in 'SYSWOW64' based path but MSBUID via Jenkins running in system service account is looking at 'System32' path.