Discord.Net/docs/guides/interactions_framework/dependency-injection.md

• Dependency Injection
• • Setup
  • Accessing the Dependencies
  • Service Scopes

Dependency Injection

Interaction Service uses dependency injection to perform most of its operations. This way, you can access service dependencies throughout the framework.

Setup

1. Create a Microsoft.Extensions.DependencyInjection.ServiceCollection.
2. Add the dependencies you wish to use in the modules.
3. Build a IServiceProvider using the BuildServiceProvider() method of the ServiceCollection.
4. Pass the IServiceProvider to AddModulesAsync(), AddModuleAsync() and ExecuteAsync() methods.

Accessing the Dependencies

Services of a IServiceProvider can be accessed using Contructor Injection and Property Injection.

Interaction Service will populate the constructor parameters using the provided IServiceProvider. Any public settable class Property will also be populated in the same manner.

Service Scopes

Interaction Service has built-in support for scoped service types. Scoped lifetime services are instantiated once per command execution. Including the Preconditon checks, every module operation is executed within a single service scope (which is sepearate from the global service scope).

For more in-depth information about service lifetimes check out Microsoft Docs.