I'm upgrading my solution from .NET 5 to .NET 6 and getting the error at runtime

Unhandled exception. System.IO.FileNotFoundException: Could not load file or assembly 'NLog.Web.AspNetCore, Version=4.0.0.0, Culture=neutral, PublicKeyToken=5120e14c03d0593c'. The system cannot find the file specified. File name: 'NLog.Web.AspNetCore, Version=4.0.0.0, Culture=neutral, PublicKeyToken=5120e14c03d0593c' at MyApp.Program.CreateHostBuilder(String[] args) at MyApp.Program.Main(String[] args) in ..\MyApp\Program.cs:line 18

I'm using NLog 4.7.15, and NLog.Web.AspNetCore 4.15.0 nuget packages. The versions did not change during upgrade. As soon as I upgraded all my projects in the solution, I started getting that error at runtime, both on Windows and macOS. As soon as I switch back to .NET 5 the error goes away. I tried upgrading to NLog 5.0.0-rc2 and I get the same error but just Version=5.0.0.0. Downgrading the packages had no effect either. I'm also using JetBrains Rider.

I'm clueless how to approach this problem. I've searched the web and haven't found any working solutions.

CodePudding user response：

Appears to be a bug in .NET 6

Having this property in the project file was causing the issue

<CopyLocalLockFileAssemblies>false</CopyLocalLockFileAssemblies>

Removing it solved it. Not the best solution as I need to use that property. Will have to open up an issue with .NET team.

EDIT: Created an issue with them: https://github.com/dotnet/runtime/issues/68720