.NET Core 3.0 - What's new?
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.NET Core 3.0 introduces several features, particularly C# 8 enhancements like nullable reference types and async streams, which aim to reduce null reference exceptions and introduce more efficient programming paradigms. It also brings updates to ASP.NET Core, including simplified service configuration and new templates, as well as advancements for WPF applications to use Windows Runtime APIs. Developers are encouraged to adopt these new features and prepare for upcoming application models.
.NET Core 3.0 - What's new?
- 1. .NET Core 3.0 – What's New? [email protected] @christiannagel https://csharp.christiannagel.com
- 2. Topics C# 8 & .NET Core 3.0 ASP.NET Core 3.0 WPF & .NET Core
- 3. Christian Nagel • Training • Coaching • Consulting • Development • Microsoft MVP • www.cninnovation.com • csharp.christiannagel.com
- 4. C# 8 & .NET Core
- 5. .NET Standard 2.1 • Reflection.Emit • Brotli • Span, APIs • DbProviderFactories • ITuple Features C# 8 Features Not supported by .NET Framework
- 6. Smaller C# 8 Features using declaration switch expression more pattern matching
- 7. C# 8 – Async Streams Before C# 8, await could be used to wait for a single result IAsyncDisposable, IAsyncEnumerable, IAsyncEnumerator foreach and yield extended with async semantics
- 8. C# 8 – Indices and Ranges • Span<T> allows reference a memory sequence • Safe code, fast access, no object copy • .NET Core 2.2 method overloads with spans • Use C# 8 Ranges to access arrays, strings… • .NET Core 3.0 faster, e.g. JSonDocument, Utf8JsonReader, UTF8JsonWriter
- 9. C# 8 – Nullable Reference Types • Reference Types are not nullable anymore • Get rid of NullReferenceException • Breaking change • Opt-in (project, code regions)
- 10. Nullability Annotation Guidance • .NET Core annotation in progress • Do annotate all new APIs • Consider changing the contracts if there's a different de facto use • Do continue to validate arguments • Do not remove existing argument validation • Avoid making changes while annotating unless it's a bug fix • some?.Method() • https://github.com/dotnet/corefx/blob/ma ster/Documentation/api- guidelines/nullability.md
- 11. ASP.NET Core 3
- 13. ASP.NET Core 3 • Generic host in Templates • Service configuration simplified • Endpoint Routing • SignalR Client-to-Server Streaming • JSON Serialization • Worker Service Template • gRPC Template
- 14. Blazor • Components for the Web • Based on Syntax of Razor Pages • Client-Side Components make use of WebAssembly • Server-Side Components communicate via SignalR • Server-Side Components released with .NET Core 3 • Client-Side Components released with a later .NET Core 3 version
- 15. WPF and .NET Core Does WPF have a future?
- 16. WPF (.NET Framework) & Windows Runtime WPF App • Use Some Windows Runtime APIs Packaging (Desktop Bridge) • Use more Windows Runtime APIs App-Service WPF – UWP • Desktop Bridge & App Service • Use all Windows Runtime APIs
- 17. XAML Islands UWP Controls for WPF & Windows Forms Wrappers for Ink, Map, Media Create your own! Windows Community Tookit
- 18. WPF & .NET Core New Project File All C# 8 & .NET Core Features Use the Windows Runtime Side-by-side Runtime Self-contained Exes
- 19. Interop Use the Portability Analyzer Windows Compatibility Pack COM Interop coming WPF only runs on Windows!
- 20. Summary • C# 8 & .NET Core • ASP.NET Core • WPF & .NET Core
- 21. Questions?
- 22. Actions • Use C# 8 • Annotate your applications & libraries • Use .NET Core 3 • Prepare for ASP.NET Core 3 • Be open for new application models • Use the portability analyzer for WPF • WPF & .NET Core • https://github.com/christiannagel • https://csharp.christiannagel.com • https://docs.microsoft.com • https://github.com/windows-toolkit/ • https://github.com/dotnet/
- 23. A BIG thank you to local sponsors!
- 24. Another BIG thank you to the 2019 Global Sponsors!
- 25. The European SharePoint, Office 365 & Azure Conference 4 Days 2,500 Delegates 150+ Sessions 120 Speakers Microsoft Azure Keynote, 40 Azure Sessions, Azure Full Day Tutorials, Expert Global Azure Speakers Use code GABLz for 10% discount on all tickets www.sharepointeurope.com