title: How to $lookup with MongoDB C# driver?
body: <p>How do I perform a $lookup with the MongoDB C# driver? I cannot find it in their driver doc here:</p>
  
  <p><a href="https://docs.mongodb.org/getting-started/csharp/query/" rel="noreferrer">https://docs.mongodb.org/getting-started/csharp/query/</a></p>
  
  <p>But if I understand this ticket in their JIRA correctly, it should be in the 2.2 version of the driver:</p>
  
  <p><a href="https://jira.mongodb.org/browse/CSHARP-1374" rel="noreferrer">https://jira.mongodb.org/browse/CSHARP-1374</a></p>