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Exchanging data via files is a standard practice on every company and on every business. In a traditional application you can read and write a file from the local file system easily. But what about a cloud-based application? Dynamics 365 Business Central is a SaaS application and you cannot directly interact with the local file system (you can do that if your extension targets the on-premises environment in the app.json file, but this is out of the target of this book because it’s not “universal code compliant”).How you can (and should) handle files with Dynamics 365 Business Central?This chapter will cover the following topics:

• Using streams
• Handling blobs
• Using XMLPorts and CSV files
• Handling XML and JSON files from AL
• Persistent Blobs
• Using the Isolated Storage
• Using Azure Blob Storage from AL