title: Fill missing weeks in linq result to 0
body: <p>I've got this kind of ViewModel, is there a easy way to fill missing weeks so instead of</p>
  <ul>
  <li>Week 17 / 30.000</li>
  <li>Week 25 / 464.000</li>
  </ul>
  <p>I've got</p>
  <ul>
  <li>Week 17 / 30.000</li>
  <li>Week 18 / 0</li>
  <li>Week 19 / 0</li>
  <li>...</li>
  <li>Week 25 / 464.000</li>
  </ul>
  <p><a href="https://i.imgur.com/QJHhKE5.png" rel="nofollow noreferrer">https://i.imgur.com/QJHhKE5.png</a></p>