C# 8 and .NET Core 3
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The document summarizes the new features of C# 8 and .NET Core 3.0, highlighting improvements such as asynchronous streams, nullable reference types, and updated desktop application frameworks like WPF and UWP. It discusses Blazor's capabilities for web component development and outlines future release plans for .NET versions. The document encourages developers to adopt these technologies and provides resources for further exploration.
C# 8 and .NET Core 3
- 1. C# 8 & .NET Core 3.0 – What's New? christian@christiannagel.com @christiannagel https://csharp.christiannagel.com
- 3. Christian Nagel • Training • Coaching • Consulting • Development • Microsoft MVP • @christiannagel • www.cninnovation.com • csharp.christiannagel.com
- 6. Asynchronous Streams New Interfaces IAsyncDisposable IAsyncEnumerable IAsyncEnumerator Statements extended yield return/break await foreach
- 8. Indexes and Ranges • ^ Hat Operator • .. Range Operator • Index and Range Types • Use C# 8 Ranges to access arrays, strings… • .NET Core 3.0 is faster • JSonDocument, Utf8JsonReader, UTF8JsonWriter • …
- 10. Nullable Reference Types • Reference Types are not nullable anymore • Get rid of NullReferenceException • Breaking change • Opt-in (project, code regions)
- 11. 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
- 12. Switch Expression & More Pattern Matching
- 13. More Features • property pattern • recursive pattern • switch expressions • using declaration • default interface methods
- 14. DesktopDoes WPF have a future?
- 15. Desktop App Development Universal Windows Platform (UWP) Windows Presentation Foundation (WPF)
- 16. UWP Features • Sandboxed Evironment • Compiled Binding • Controls (Inking, WebView, Maps…) • Windows Runtime APIs
- 17. Updates • Windows UI Library independent from Windows Versions • XAML Islands (use UWP Controls with WPF) • Use Windows Runtime with WPF • .NET Core WPF with .NET Core
- 18. XAML Islands UWP Controls for WPF & Windows Forms Wrappers for Ink, Map, Media Create your own! Windows Community Tookit
- 19. WPF & .NET Core New Project File All C# 8 & .NET Core Features Use the Windows Runtime Side-by-side Runtime Self-contained Exes
- 20. Interop Use the Portability Analyzer Windows Compatibility Pack COM Interop coming WPF only runs on Windows!
- 21. Blazor
- 22. ASP.NET Core 3 Features • Generic host in Templates • Service configuration simplified • Endpoint Routing • SignalR Client-to-Server Streaming • JSON Serialization • Worker Service Template • gRPC Template
- 23. 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
- 24. Release Plans Release .NET Core 3.0 Sep. 2019 .NET Core 3.1 (LTS) Nov. 2019 .NET 5.0 Sep. 2020 .NET 6.0 (LTS) Sep. 2021 .NET 7.0 Sep. 2022 .NET 8.0 (LTS) Sep. 2023
- 25. Summary • C# 8 – The Language & .NET Core • Desktop - WPF & .NET Core • Blazor & ASP.NET Core
- 26. Questions?
- 27. 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/
- 28. Thank you!
- 29. Images Copyright – Dreamstime.com • Learning foreign languages • © Gpointstudio • Flowing water stream • © Auris • 3D cubes • © Styleuneed • Null • © ProfitImage • Car climate control switch 3 • © Nui7711 • Modern Desktop • © Geraldo Pena • Blazer • © Wafebreakmedia Ltd • Speaker answering questions • © Vadymvdrobot • Bucharest night scene • © Foton64