normalScope2.cs

public class SadService
{
    public SadService()
    {
        Console.WriteLine("SadService Created");
    }
    public void Do()
    {
        Console.WriteLine("Oh oh oh oh oh oh oh oh...");
    }
}

[ApiController]
[Route("[controller]")]
public class HeartController : ControllerBase
{
    private readonly SadService _sad;

    public HeartController(SadService sad)
    {
        _sad = sad;
    }

    [HttpGet]
    public ActionResult Get()
    {
        _sad.Do();
        
        return Ok();
    }
}