Back in the .Net Interoperability recipe in Chapter 3, Let's Go Beyond, I mentioned a few times that using .NET controls in an online Business Central environment is not allowed. So, what do you do if your solution requires .NET and there's no other way to do what you need to do?

Azure Functions is a serverless application that's published in Azure and that can be called from your Business Central application. This is where you can put your .NET DLLs and logic, which will then let you use .NET in your online Business Central systems.

This recipe will show you how to publish an Azure Function and call it from a Business Central application.