Azure Functions are built for short, reactive tasks triggered by external events. Functions only cost money when they run. For workflows that spike or barely show up, this keeps spend tight without constant tuning. If you’re using .NET, the execution model matters. By 2026, the in-process model is deprecated. Isolated Functions are the only viable path forward - with more control, more setup, and fewer surprises. This article breaks down what Azure Functions are, where they make sense, and what the .NET shift means for long-term architecture.
Ruslan Odinets
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6
min read