title: Adding BSON array to BsonDocument  in MongoDB
body: <p>How can I add BsonArray to BsonDocument in MongoDB using a C# driver? I want a result something like this</p>
  
  <pre><code>{ 
      author: 'joe',
      title : 'Yet another blog post',
      text : 'Here is the text...',
      tags : [ 'example', 'joe' ],
      comments : [ { author: 'jim', comment: 'I disagree' },
                   { author: 'nancy', comment: 'Good post' }
      ]
  } 
  </code></pre>