title: Network Path in JSON stringified dictionary
body: <p>I'm trying to start a build on TFS 2017 via JSON as shown in this example:
  <a href="https://www.visualstudio.com/en-us/docs/integrate/api/build/builds#queue-a-build" rel="nofollow noreferrer">https://www.visualstudio.com/en-us/docs/integrate/api/build/builds#queue-a-build</a></p>
  
  <p>This is my JSON:</p>
  
  <pre><code>{
  "definition": 
  {
      "id": 167
  },
  "sourceBranch": "refs/heads/master",
  "parameters": "{\"system.debug\":\"false\",\"BuildConfiguration\":\"release\",\"BuildPlatform\":\"any cpu\",\"PushInfoXmlFilePath\":\"\\\\08tfs02\\PushInformation\\PushInfo896.xml\"}"
  }
  </code></pre>
  
  <p>Looking into the event log I saw this exception:</p>
  
  <blockquote>
    <p>Newtonsoft.Json.JsonReaderException: Bad JSON escape sequence: \P.
    Path 'PushInfoXmlFilePath', line 1, position 115.</p>
  </blockquote>
  
  <p>I have tried it replacing the network path <strong>\"\\08tfs02\PushInformation\PushInfo896.xml\"</strong> with a simple <strong>\"test\"</strong> and then it works without error.</p>
  
  <p>How can I make it work with the network path?</p>