Key Differences
Programming Model:
Microsoft.Azure.Functions.Worker.Sdk is used for the isolated worker model.
Microsoft.Azure.Functions.Sdk is used for the in-process model.
Execution Process:
Isolated worker model runs functions in a separate process.
In-process model runs functions within the same process as the runtime.
Dependency Management:
Isolated worker model offers better isolation and fewer version conflicts.
In-process model can suffer from version conflicts with the runtime.
Supported Frameworks:
Isolated worker model supports .NET 5 and later.
In-process model supports .NET Core and .NET Framework.
Summary
Choosing between Microsoft.Azure.Functions.Worker.Sdk and Microsoft.Azure.Functions.Sdk depends on your specific needs and the programming model you prefer. The isolated worker model (Microsoft.Azure.Functions.Worker.Sdk) is more modern and aligns with recent .NET practices, providing better isolation and flexibility. The in-process model (Microsoft.Azure.Functions.Sdk) is simpler and might be preferable for legacy projects or those that benefit from tighter integration with the Azure Functions runtime.