title: Can't resolve all parameters for Component: (? ? ?)
body: <p>I am getting this error when I add</p>
  <p>constructor(
  private fb: FormBuilder
  )</p>
  <pre><code>Uncaught Error: Can't resolve all parameters for RegisterComponent: (?).
      at syntaxError (compiler.js:2196)
      at CompileMetadataResolver._getDependenciesMetadata (compiler.js:17927)
      at CompileMetadataResolver._getTypeMetadata (compiler.js:17823)
      at CompileMetadataResolver.getNonNormalizedDirectiveMetadata (compiler.js:17452)
      at CompileMetadataResolver._getEntryComponentMetadata (compiler.js:18022)
      at compiler.js:18014
      at Array.forEach (&lt;anonymous&gt;)
      at CompileMetadataResolver._getEntryComponentsFromProvider (compiler.js:18013)
      at compiler.js:17984
      at Array.forEach (&lt;anonymous&gt;)
  </code></pre>