Cannot resolve all parameter (error in component when ResponsiveSizoInfoRX injected)

[aleperfetti81]

Hi all,

i receive attached compiler error when i try to inject ResponsiveSizoInfoRX to a component, like this:

constructor(
......
protected responsiveSizeInfoRx: ResponsiveSizeInfoRx,
protected activatedRoute: ActivatedRoute,
protected router: Router
) {

I know that is a class, and is not declared as a service. But how can i use it like a service without receiving the compiler error?

Thank you very much.