title: Angular4 give has no exported member( Failed to compile)
body: <p>I am implementing one demo project in Angular4 and I am also new in this(Angular4). I have seen one link,<a href="https://stackoverflow.com/questions/41264962/angular2-module-has-no-exported-member">Angular2 module has no exported member</a>, But I am not able to solve this problem. </p>
  
  <p><strong>app.module.ts</strong></p>
  
  <pre><code>import { BrowserModule } from '@angular/platform-browser';
  import { NgModule } from '@angular/core';
  import { HttpModule } from '@angular/http';
  import { RouterModule } from '@angular/router';
  import { FormsModule, ReactiveFormsModule } from '@angular/forms';
  import { AppComponent } from './app.component';
  import { VideoListComponent } from './training/video-list.component';  
  import { HomeComponent } from './training/home.component';     
  import { AddVideoComponent } from './training/add-video.component';
  import { AboutusComponent } from './training/aboutus.component';
  
  
  @NgModule({
    declarations: [
      AppComponent,
      VideoListComponent,
      HomeComponent,      
      AddVideoComponent,
      AboutusComponent        
    ],
    imports: [
      BrowserModule,
      HttpModule,
      FormsModule,
      ReactiveFormsModule,
      RouterModule.forRoot([
        {path: 'home', component:HomeComponent},     
        {path: 'videos', component:VideoListComponent},          
        {path :'newvideo',component:AddVideoComponent},
        {path: 'aboutus', component:AboutusComponent},
        {path: '', redirectTo:'home',pathMatch:'full'},
        {path: '**', redirectTo:'home',pathMatch:'full'}
      ])
    ],    
    bootstrap: [AppComponent]
  })
  export class AppModule { }
  </code></pre>
  
  <p><strong>aboutus.component.ts</strong></p>
  
  <pre><code>import { Component } from '@angular/core';
  console.log('It works here');
  @Component({
      moduleId: module.id,
      templateUrl: 'aboutus.html'
  })
  
  export class AboutusComponent {
      s: string = "Hello";
      constructor() {
          console.log(this.s)
      }
  }
  </code></pre>
  
  <p>I want to add <strong>AboutusComponent</strong> than it is giving compile failed.</p>
  
  <p><strong><em>I am sharing my directory structure</em></strong>
  <a href="https://i.stack.imgur.com/sp77l.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/sp77l.png" alt="enter image description here"></a></p>
  
  <p><strong><em>It give me some error in browser(in below screen shot).</em></strong>
  <a href="https://i.stack.imgur.com/VlmHA.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/VlmHA.png" alt="enter image description here"></a></p>
  
  <p>I want to add new module in angular4
  Please share your idea. </p>