VSCode [release-2026w33-lav2] - Version1.186.2 - Issue with Debug in Nuget

[pahnimantha]

Severity

P3 - Medium (Minor functionality affected)

Describe the Bug with repro steps

Initially we ran test case in Bundle and then we converted into Nuget using below steps

1. Right click on project and click on "Convert to NuGet-based logic app project"
2. Copy paste Nuget package into project folder
3. update Nuget version in .csproj file
4. Create nuget.config file and update the file with required code
5. And finally project will be in Nuget

While executing the NuGet package scenarios, we are encountering the error shown in the attached screenshot.
To continue workflow execution, we explored a couple of potential solutions using the inbuilt Toggle Chat agent. Both approaches allowed the run to succeed. Could you please review the options below and advise whether we can proceed with either of them to complete the testing?
Option 1:

In the logicapp.csproj file, we normally use:

We modified it to:

After making this change, the workflow execution completed successfully.

Option 2:

We typically do not modify the tasks.json file under the .vscode folder. However, after adding the following line:
"/property:BuildingInsideVisualStudio=true",

the workflow execution succeeded.

What type of Logic App Is this happening in?

Standard (VSCode)

Are you experiencing a regression?

No response

Which operating system are you using?

Windows

Did you refer to the TSG before filing this issue? https://aka.ms/lauxtsg

Yes

Workflow JSON

Screenshots or Videos

No response

Environment

Browser: Edge Version 151.0.4129.107 (Official build) (64-bit)
VS Code Version: 1.134.0
Extension Version: 5.992.0
Bundle / Nuget Version: 1.186.2

Additional context

No response

[github-actions]

AI Triage Analysis

Component: VS Code Extension (NuGet project debug) | Priority: P3 | SKU: Standard (VSCode)

Relevant Code

• apps/vs-code-designer/src/app/projectConsistency/fileGenerators/vscodeTasks.ts:L14-L92 — Generates tasks.json for NuGet projects. COMMON_DOTNET_ARGS is ['/property:GenerateFullPaths=true', '/consoleloggerparameters:NoSummary'] — notably does not include /property:BuildingInsideVisualStudio=true.
• apps/vs-code-designer/src/app/commands/workflows/switchToDotnetProject.ts — Conversion command ("Convert to NuGet-based logic app project") that triggers project restructuring and tasks.json regeneration.

Probable Root Cause

Code search confirms that the generated tasks.json for NuGet-based projects uses COMMON_DOTNET_ARGS which lacks /property:BuildingInsideVisualStudio=true. The reporter's Option 2 workaround (adding this property to tasks.json) directly points to the generated file as the source of the problem. The generateNugetTasksJson function in vscodeTasks.ts may need to include this MSBuild property in COMMON_DOTNET_ARGS or as a NuGet-specific arg so the debug build succeeds out-of-the-box after conversion.

Option 1 (changing <Nullable>enable</Nullable> to <Nullable>annotations</Nullable>) suggests a secondary path — certain Nullable analysis modes may fail during the VS Code debug build but pass when BuildingInsideVisualStudio=true suppresses those checks.

Suggested Investigation

1. In vscodeTasks.ts, check if adding /property:BuildingInsideVisualStudio=true to the build task args (or a new NuGet-specific arg list) resolves the failure for freshly-converted projects.
2. Reproduce by running "Convert to NuGet-based logic app project", then F5 debug — confirm the generated tasks.json lacks the property.
3. Evaluate whether the fix belongs in COMMON_DOTNET_ARGS (applies globally) or only in generateNugetTasksJson (scoped to NuGet).

Similar Issues

• [Bundle][Nuget] : We receive a pop-up when debugging the workflow for the first time. #8599 — [Bundle][Nuget] : We receive a pop-up when debugging the workflow for the first time. (open) — related NuGet debug friction area.

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