[ERROR] NG8001: 'router-outlet' is not a known element:

import { NgModule } from '@angular\/core';
import { BrowserModule } from '@angular\/platform-browser';
import { RouterModule } from '@angular\/router'; \/\/ Import RouterModule
import { AppComponent } from '.\/app.component';

@NgModule({
  declarations: [
    AppComponent,
    \/\/ other components
  ],
  imports: [
    BrowserModule,
    RouterModule.forRoot([]) \/\/ Initialize routing
  ],
  providers: [],
  bootstrap: [AppComponent]
})
export class AppModule { }