The Modern .NET Show

Building on .NET 10: A Chat with Kajetan Duszyńsk, Author of '.NET 10 Revealed'

Nov 28, 2025
Kajetan Duszyński, a Microsoft MVP, author and .NET instructor from Poland, talks about practical .NET 10 features and his new book. He highlights Minimal APIs enabling vertical-slice design, single-file C# scripting and prototyping, release cadence and upgrade readiness, dependency cleanup, and runtime/tooling changes to watch for during upgrades.
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INSIGHT

Performance Gains Often Need No Deep Dive

  • Deep runtime performance changes benefit most apps transparently, yet only specialists dig into the details.
  • Most developers gain from annual runtime improvements without needing in-depth platform knowledge.
ADVICE

Try Upgrades On New Services First

  • When upgrading use a new microservice or prototype first instead of upgrading critical production systems.
  • Test libraries and build pipelines with the release candidate to reveal integration issues early.
ADVICE

Audit Dependencies Before Upgrading

  • When upgrading, audit dependencies and remove libraries you barely use to avoid future commercial/license issues.
  • Use the Upgrade Assistant tool to find breaking changes before migrating.
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