title: How to get list of all collections in a DocumentDB document?
body: <p>I have created a lot of collections in a DocumentDB database. How can I retrieve the list of existing collections in the database? </p>
  
  <p>I have just started exploring DocumentDb from the <a href="http://azure.microsoft.com/en-in/documentation/articles/documentdb-sql-query/" rel="noreferrer">official documentation</a>.</p>