.NET 8 → .NET 9 Migration Migrate a .NET 8 project or solution to .NET 9, systematically resolving all breaking changes. The outcome is a project targeting that builds cleanly, passes tests, and accounts for every behavioral, source-incompatible, and binary-incompatible change introduced in the .NET 9 release. When to Use - Upgrading from to - Resolving build errors or new warnings after updating the .NET 9 SDK - Adapting to behavioral changes in .NET 9 runtime, ASP.NET Core 9, or EF Core 9 - Replacing usage (now always throws at runtime) - Updating CI/CD pipelines, Dockerfiles, or deployment…