Could not load file or assembly 'Microsoft.Extensions.Configuration.Binder, Version=8.0.0.0 error

[Tony20221]

I am getting this error as soon as I run the app
"Could not load file or assembly 'Microsoft.Extensions.Configuration.Binder, Version=8.0.0.0"

I have cleaned and rebuilt the app several times. I couldn't find a transitive package dependency that requires version 8.0.0.0.

I have added Microsoft.Extensions.Configuration.Binder 9.0.7 to some projects

[nithyav2017]

You can check which version of Microsoft.Extensions.Configuration.Binder is being pulled in by inspecting transitive dependencies. Run this command for the specific project you're troubleshooting (not from the solution root):

dotnet list project-path\eShop\src\Catalog.API\Catalog.API.csproj package --include-transitive

Look for the version listed under Microsoft.Extensions.Configuration.Binder.
Also, check the in your .csproj file—package versions are often resolved transitively based on the framework version (e.g., net8.0 vs net9.0).

If any project still expects version 8.0.0.0 and it's missing at runtime, try adding it explicitly:

dotnet add package Microsoft.Extensions.Configuration.Binder --version 8.0.0

That should resolve the assembly binding issue.