title: What is the underlying programming language used in Azure Data Factory?
body: <p>I'm experimenting with Azure Data Factory and building pipelines.</p>
  <p>I want to know what language is ADF built upon. I see that a pipeline's properties are saved in JSON but what programming language actually parses through the JSON to build the pipeline?</p>
  <p>I can't find documentation for this. Any related links would be super helpful.</p>