Using the Microsoft.Azure.Functions.Extensions NuGet package you can now setup dependency injection for Azure Functions v2.

Implementation Factories in ASP.Net Core Dependency Injection offers more control over how the dependency is crated especially with legacy code or other libraries, you many not always have the option of automatic dependency creation.

.Net Core dependency injection allows you to register and use multiple implementations of a dependency in your .Net core applications. Learn how you can register multiple dependencies in your ASP.Net Core application.

Learn about using ServiceDescriptors to register dependencies for .Net core applications.