How do I inject a dependency in custom Azure data factory (ADF) actions?

I am creating a custom activity by implementing the IDotNetActivity interface.

Here are a few steps I follow in my custom activity:

• Read a file from a blob container.
• Do some conversion
• Override the same file.

The project type is a class library in the asp.net core template. At the moment I am initializing all dependencies in my user activity class, but I want to use dependency injection to make it loosely coupled, testable and reuse some code I already wrote to read files from blob container, etc.

Has anyone implemented DI in a .NET core class library project with native DI capabilities for .NET Core? If yes, then please share some link so I can implement it in my project as well.