title: ApplicationInsights TrackException() is not logging stacktrace
body: <p><code>ApplicationInsights TrackException()</code> is not logging a stacktrace.</p>
  
  <p>The call is very simple, something like this:</p>
  
  <pre><code>this.telemetry.TrackException(ex, properties);
  </code></pre>
  
  <p>The exception (of course thrown &amp; caught) was having a stacktrace when passed to TrackException().</p>
  
  <p>The json produces by application insights is something like this (I can see it in the output window):</p>
  
  <pre><code>{
    "name": "Microsoft.ApplicationInsights.ff0c6b7759fa46cdbec661fecb9efb4d.Exception",
    "time": "2017-03-03T13:31:15.5946550Z",
    "iKey": "ff0c6b77-59fa-46cd-bec6-61fecb9efb4d",
    "tags": {
      "ai.cloud.roleInstance": "POSTAZIONE-DEV1",
      "ai.internal.sdkVersion": "dotnet:2.2.0-54037"
    },
    "data": {
      "baseType": "ExceptionData",
      "baseData": {
        "ver": 2,
        "properties": {
          "Keywords": "0x0000000000000000",
          "EventName": "ExceptionInHealthTrackerProc",
          "Level": "Always",
          "ProviderName": "Gamshy.RandomNumberGenerator.Service.ServiceEventSource",
          "EventId": "-1"
        },
        "exceptions": [
          {
            "id": 51763190,
            "typeName": "System.Exception",
            "message": "Tentativo di divisione per zero.",
            "hasFullStack": true
          }
        ]
     }
    }
  }
  </code></pre>
  
  <p>The ApplicationInsights nuget package is Microsoft.ApplicationInsights 2.2.0</p>
  
  <p>This is a screenshot of the data I can see querying from Analytics in the Azure portal.
  <a href="https://i.stack.imgur.com/i2Qu0.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/i2Qu0.png" alt="enter image description here"></a></p>
  
  <p>Any idea? Is the AI library supposed not to log the stacktrace?</p>