title: How do I set the api key in System.Net.WebClient
body: <p>What would be the best way for me to set the api key value when deserealizing json from a url. The code I am using is below but I don't know how to state the api key</p>
  
  <pre><code>using (var webClient = new System.Net.WebClient())
      {
          var myTable = webClient.DownloadString(url);
          var deserealizedTable = JsonConvert.DeserializeObject&lt;MyClass&gt;(myTable);
      }
  </code></pre>
  
  <p>The providers of the key said I should modify my client to use 
  a header-field "Authentication-Token" with the token that was provided as the value.</p>