title: ReferenceError: Rx is not defined
body: <p>I am just started learning angular2 and I am trying to do sample of RxJs using angular2. It would be highly appreciated, If some one help me. </p>
  
  <p>RxJs Code-</p>
  
  <pre><code>var obs = Rx.Observable.interval(500)
         .take(5)
         .do(i =&gt; console.log(i) );
  </code></pre>
  
  <p>package.json</p>
  
  <pre><code>  {
      "name": "angular-quickstart",
      "version": "1.0.0",
      "scripts": {
        "start": "tsc &amp;&amp; concurrently \"tsc -w\" \"lite-server\" ",
        "lite": "lite-server",
        "postinstall": "typings install",
        "tsc": "tsc",
        "tsc:w": "tsc -w",
        "typings": "typings"
      },
      "license": "ISC",
      "dependencies": {
      "@angular/common": "~2.0.1",
      "@angular/compiler": "~2.0.1",
      "@angular/core": "~2.0.1",
      "@angular/forms": "~2.0.1",
      "@angular/http": "~2.0.1",
      "@angular/platform-browser": "~2.0.1",
      "@angular/platform-browser-dynamic": "~2.0.1",
      "@angular/router": "~3.0.1",
      "@angular/upgrade": "~2.0.1",
      "angular-in-memory-web-api": "~0.1.1",
      "bootstrap": "^3.3.7",
      "core-js": "^2.4.1",
      "reflect-metadata": "^0.1.8",
      "rxjs": "5.0.0-beta.12",
      "systemjs": "0.19.39",
      "zone.js": "^0.6.25"
      },
      "devDependencies": {
        "concurrently": "^3.0.0",
        "lite-server": "^2.2.2",
        "typescript": "^2.0.3",
        "typings":"^1.4.0"
      }
    }
  </code></pre>