A very simple demo of how to use events in DI environments.

EventsDemo.cs

// A very simple service example contract with an event. 
// Using an interface ensures that every implementation has same events.
public interface IContentService
{
    event EventHandler Saved;
}

// Our component contract
public interface IComponent : IDisposable
{
}

// And your custom component. 
// Subscription and unsubscription are now bound to the lifecycle of the component which should be managed ultimately by the container.
public class MyComponent : IComponent
{
    private readonly IContentService contentService;

    public MyComponent(IContentService contentService)
    {
        this.contentService = contentService;
        this.contentService.Saved += this.ContentServiceOnSaved;
    }

    public void Dispose() => this.contentService.Saved -= this.ContentServiceOnSaved;

    private void ContentServiceOnSaved(object sender, EventArgs e)
    {
        // Do your thing.
    }
}

Context
https://twitter.com/zpqrtbnk/status/1093465481686724609