The traditional .NET Portability Analyzer (often called ) is currently being deprecated and replaced by newer modernization tools.
Here is a draft piece summarizing the transition to the "new" recommended workflow:
From Analyzer to Assistant: Modernizing Your Portability Workflow
If you are looking for the latest way to assess your application's flexibility across platforms, the landscape has shifted. While the .NET Portability Analyzer
served as the go-to tool for identifying missing APIs when moving from .NET Framework to .NET Core, Microsoft is now pointing developers toward the .NET Upgrade Assistant as its successor. Why the Change?
The original Portability Analyzer relied on a backend service that has been shut down, meaning the tool must now be used in a restricted offline mode . More importantly, it is not supported in Visual Studio 2022 portability analyzer new
or later. To keep up with modern environments like .NET 6, 7, and 8, you must pivot to newer alternatives. The New Recommended Tools: .NET Upgrade Assistant
: This is the primary replacement. It doesn't just analyze; it can automate many of the changes required for an upgrade, including project file conversions and NuGet package updates. Platform Compatibility Analyzer
: Included in the .NET SDK, this Roslyn-based tool identifies APIs at compile-time that might throw a PlatformNotSupportedException on specific operating systems. Binary Analysis (Upgrade Assistant Preview)
: For those who need to check third-party dependencies without source code, the Upgrade Assistant now includes binary analysis features similar to the old ApiPort. Quick Comparison: ApiPort.exe to generate an Excel or HTML report of missing APIs. Upgrade Assistant extension
directly within Visual Studio 2022 to "Analyze" or "Upgrade" your project step-by-step. While the "alpha" version of the API Portability Analyzer The traditional
received a minor maintenance update as recently as May 2024 to support legacy environments, the path forward for new development is clear: the Upgrade Assistant is the new standard for portability analysis. on how to run the new Upgrade Assistant's analysis command for your specific project type? The .NET Portability Analyzer - Microsoft Learn
Old analyzers checked for __NR_open. New analyzers understand that openat2 (Linux 5.6) isn’t just a different number—it’s a different contract. Modern portability analyzers maintain a matrix of syscall availability per kernel version and architecture.
Example: If your Rust code uses io_uring (via tokio-uring), a new analyzer will flag: “Not portable to FreeBSD 13.x; io_uring is Linux 5.1+ only.”
Phase 1 (0–3 months):
Phase 2 (3–6 months):
Phase 3 (6–12 months):
Phase 4 (12+ months):
The most significant upgrade is dynamic environmental compensation. Older portable units would lose accuracy in high humidity or extreme temperatures. The new portability analyzer uses onboard microprocessors to apply live corrections for barometric pressure, relative humidity, and ambient temperature, rivaling benchtop performance.
| Metric | v2.x | New v3.0 | |--------|------|----------| | Analysis speed (1M LOC) | 12 min | 2 min 10 sec | | False positive rate | 18% | 4.2% | | Supported languages | 3 | 8 | | Supported output formats | 1 | 5 |
Uses incremental parsing and persistent symbol database. Build environment matrix generator using QEMU user-mode +