The build step hanging in an ASP.NET Core 8 project could be due to several reasons:
- Long-running tasks: Background tasks like tests or build processes are not completing.
- MSBuild deadlock: A deadlock within the build process may cause it to hang.
- Tooling issues: Outdated or incompatible SDK/tools may cause issues. Ensure you're using the correct .NET SDK.
- Resource limits: The build agent might run out of memory or CPU, causing it to freeze.
Check verbose logs, update tools, and try building locally to reproduce the issue.