[BUG]: Azure Web App Deploy v1.x: .NET 10 runtime stack not working in dropdown #21481
Description
New issue checklist
- I searched for existing GitHub issues
- I read pipeline troubleshooting guide
- I checked how to collect logs
Task name
Azure Web App Deploy v1.x: .NET 10 runtime stack not working in dropdown
Task version
1.x
Issue Description
Environment
- Azure DevOps: Cloud/Server
- Agent: Microsoft-hosted
- Target: Azure App Service (Windows/Linux)
Steps to reproduce
- Edit Azure Pipeline with Azure Web App Deploy task v1.x
- Select Runtime Stack: There is no dotnet 10 so paste DOTNET 10 -> it changes to ".NET 10.0"
- Save and run pipeline
- Deployment may success but in Azure there will be no Stack selected so App won't work
Expected behavior
The task should automatically set the correct runtime stack value DOTNETCORE|10.0 when .NET 10 is selected from the dropdown.
Actual behavior
The dropdown selection doesn't work. Manual override with DOTNETCORE|10.0 is required.
Workaround
Manually set the runtime stack value to DOTNETCORE|10.0 in YAML.
Environment type (Please select at least one enviroment where you face this issue)
- Self-Hosted
- Microsoft Hosted
- VMSS Pool
- Container
Azure DevOps Server type
dev.azure.com (formerly visualstudio.com)
Azure DevOps Server Version (if applicable)
No response
Operation system
linux
Relevant log output
2025-11-24T09:24:25.2968966Z ##[section]Starting: Azure Web App Deploy: LegalApi
2025-11-24T09:24:25.2979610Z ==============================================================================
2025-11-24T09:24:25.2979828Z Task : Azure Web App
2025-11-24T09:24:25.2979962Z Description : Deploy an Azure Web App for Linux or Windows
2025-11-24T09:24:25.2980128Z Version : 1.264.0
2025-11-24T09:24:25.2980228Z Author : Microsoft Corporation
2025-11-24T09:24:25.2980346Z Help : https://aka.ms/azurewebapptroubleshooting
2025-11-24T09:24:25.2980482Z ==============================================================================
2025-11-24T09:24:26.0097800Z Got service connection details for Azure App Service:''
2025-11-24T09:24:36.2821533Z Package deployment using ZIP Deploy initiated.
2025-11-24T09:25:59.2913287Z Deploy logs can be viewed at https://d584/log
2025-11-24T09:25:59.2914126Z Successfully deployed web package to App Service.
2025-11-24T09:25:59.7633096Z Trying to update App Service Configuration settings. Data: {"linuxFxVersion":".NET 10.0","appCommandLine":""}
2025-11-24T09:26:34.4736895Z Updated App Service Configuration settings.
2025-11-24T09:26:37.0378430Z Successfully added release annotation to the Application Insight :
2025-11-24T09:26:50.9713082Z Successfully updated deployment History at https://3976397037
2025-11-24T09:26:51.3010519Z App Service Application URL: https://.azurewebsites.net
2025-11-24T09:27:09.2277362Z ##[section]Finishing: Azure Web App Deploy:Full task logs with system.debug enabled
2025-11-24T09:24:25.2968966Z ##[section]Starting: Azure Web App Deploy: LegalApi
2025-11-24T09:24:25.2979610Z ==============================================================================
2025-11-24T09:24:25.2979828Z Task : Azure Web App
2025-11-24T09:24:25.2979962Z Description : Deploy an Azure Web App for Linux or Windows
2025-11-24T09:24:25.2980128Z Version : 1.264.0
2025-11-24T09:24:25.2980228Z Author : Microsoft Corporation
2025-11-24T09:24:25.2980346Z Help : https://aka.ms/azurewebapptroubleshooting
2025-11-24T09:24:25.2980482Z ==============================================================================
2025-11-24T09:24:26.0097800Z Got service connection details for Azure App Service:''
2025-11-24T09:24:36.2821533Z Package deployment using ZIP Deploy initiated.
2025-11-24T09:25:59.2913287Z Deploy logs can be viewed at https://d584/log
2025-11-24T09:25:59.2914126Z Successfully deployed web package to App Service.
2025-11-24T09:25:59.7633096Z Trying to update App Service Configuration settings. Data: {"linuxFxVersion":".NET 10.0","appCommandLine":""}
2025-11-24T09:26:34.4736895Z Updated App Service Configuration settings.
2025-11-24T09:26:37.0378430Z Successfully added release annotation to the Application Insight :
2025-11-24T09:26:50.9713082Z Successfully updated deployment History at https://3976397037
2025-11-24T09:26:51.3010519Z App Service Application URL: https://.azurewebsites.net
2025-11-24T09:27:09.2277362Z ##[section]Finishing: Azure Web App Deploy:
Repro steps
1. Edit Azure Pipeline with Azure Web App Deploy task v1.x
2. Select Runtime Stack: There is no dotnet 10 so paste DOTNET 10 -> it changes to ".NET 10.0"
3. Save and run pipeline
4. Deployment may success but in Azure there will be no Stack selected so App won't work