title: node_modules/rxjs/ BehaviorSubject has no exported member 'BehaviorSubject'
body: <p>I am working with angular services and I got an error which is caused by <code>BehaviorSubject</code>.</p>
  
  <p><strong>Error</strong></p>
  
  <blockquote>
    <p>Module '"ng5/node_modules/rxjs/BehaviorSubject"' has no exported member 'BehaviorSubject'.</p>
  </blockquote>
  
  <p><strong>data.service.ts</strong></p>
  
  <pre><code>import { Injectable } from '@angular/core';
  import { BehaviorSubject } from 'rxjs/BehaviorSubject';
  
  @Injectable()
  export class DataService {
  
    constructor() { }
  }
  </code></pre>