Jupyter Notebooks are in everywhere in these days. You can write chunk of code and run it on a web application without worrying about compiler is a great feeling. C# has been little bit late to the party, but we started to see C# Notebooks lately too. Azure Cosmos DB announced their version if C# Notebook this week.
You can reach all notebook functionalities under the Data Explorer link, There are bunch of sample notebooks you will see under the Notebook link.
There are some limitations here, like needing to use the SQL API, but it’s an interesting approach to data access in Cosmos DB.