NullInjectorError: No provider for service in library

Problem:

I work in angular workspace and I import common.module.ts from library (library generated with ng generate library) to my app.module.ts, but when I inject CommonService in app.component.ts I get error:

main.ts:11 ERROR NullInjectorError: R3InjectorError(AppModule)[CommonService -> CommonService -> CommonService]: NullInjectorError: No provider for CommonService! 

There is an provider for CommonService in common.module.ts so I expect when I inject service in component no error should occure.

Code:

Library module common.module.ts

import { NgModule } from '@angular/core'; import { CommonComponent } from './common.component'; import { HttpClientModule } from '@angular/common/http'; import { CommonService } from './common.service'; @NgModule({ declarations: [], imports: [], exports: [], providers: [ CommonService ] }) export class CommonModule { } 

Application module app.module.ts

import { NgModule } from '@angular/core'; import { BrowserModule } from '@angular/platform-browser'; import { AppComponent } from './app.component'; import { HttpClientModule } from '@angular/common/http'; import { CommonModule } from 'common'; @NgModule({ declarations: [ AppComponent ], imports: [ BrowserModule, HttpClientModule, CommonModule ], providers: [ ], bootstrap: [AppComponent] }) export class AppModule { } 

app.component.ts

import { Component } from '@angular/core'; import { CommonService } from '../../../common/src/lib/common.service'; @Component({ selector: 'app-root', templateUrl: './app.component.html', styleUrls: ['./app.component.less'] }) export class AppComponent { constructor(private common2: CommonService) { } } 

common.service.ts

@Injectable() export class CommonService { constructor() { this.initProps(); } }