Can I use Entity Framework Core in a SharePoint Timer Job?

Question

I have a timer job where I need to update some information in a database. The DbContext is implemented in an external assembly, using EFCore. When I run the timer job, I get the following exception:

The Execute method of job definition MyTimerJob (ID 7fc1c5a7-4965-49ff-844d-84a274f6873c) threw an exception. More information is included below. Could not load file or assembly 'Microsoft.Extensions.DependencyInjection.Abstractions, Version=1.1.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60' or one of its dependencies. The system cannot find the file specified.

I see this was a common issue. However, I am not sure how to fix this in my scenario. The file is in the GAC, I have performed IISRESET and restarted the timer service, however, that did not help. Do you have any ideas on how I could fix this?

Answer 1

Not without some sort of proxy layer (similar to how CSOM is implemented). SharePoint Server uses the .NET Framework, not .NET Core, so the binaries are incompatible.