Unable to debug with breakpoints in Azure Function app initialization code in Program.cs

[nlykkei]

Describe the Issue

I want to break add breakpoints in Azure Function app initialization code in Program.cs.

Consider the following code:

This breakpoint is ignored in VS Code, but works fine in JetBrains Rider. In VS Code, breakpoints only works in function code, i.e. methods with the attribute [Function(nameof(MyFunction))].

Steps To Reproduce

Create a new Azure Function app project from a template, set a breakpoint in Program.cs, and run the project in debug mode (F5)

Expected Behavior

I expect that debugging breaks at the breakpoint in Program.cs

Environment Information

OS: MacOS (M3/arm64)
VS Code: 1.96.2
C# Dev Kit: 1.14.14

[WardenGnaw]

This is related to microsoft/vscode-azurefunctions#1971

At the moment, the debugger works with the Functions CLI by attaching to the process which makes it support breakpoints too late.

There are plans in the backlog to support launching Az Functions instead of just attaching.

[nlykkei]

Thank you. @WardenGnaw What do you mean by "Az Functions"? Do you mean the Functions CLI?

[golfalot]

Experiencing the same frustrations on Windows and Azure Functions 2.x .NET 8.0 isolated, on two different computers with all the updated tooling installed. func host start --dotnet-isolated-debug does not correct the problem.