.NET Core 3.0 includes performance improvements, enhancements to SignalR, new endpoint routing for web apps, the introduction of Blazor and Razor Components, an in-box JSON reader, support for async streams, new C# 8.0 features, improvements to Entity Framework 3.0, support for HTTP/2, and the ability to publish self-contained executables. The presentation provides an overview of the key new features in .NET Core 3.0 across areas like performance, web development, client-side frameworks, languages, and tools.

1. What’s New in .NET Core 3.0
Alexandre Malavasi

2. About me
MCP | MCTS | MCPD | ITIL | .NET | MBA | MTAC |
Technical Leader | Consultant | .NET Developer
Medium.com/@alexandre.malavasi
LinkedIn.com/in/alexandremalavasi
Twitter.com/alemalavasi

3. Agenda
• Difference between .NET 2.0 and .NET Core 3.0
• Performance improvements
• SignalR
• Endpoint routing for Web App
• Blazor and Razor Components

4. Agenda
• In-box JSON Reader
• Async Streams
• Switch expressions and other new features in C# 8.0
• Entity Framework 3.0
• Http/2 support
• Self-contained EXEs

5. What’s New in .NET Core 3.0

6. Performance inprovements

7. The Journey in .NET Core
.NET Core 1.0 2016/06/27
.NET Core 1.1 2016/11/16
.NET Core 2.0 2017/08/14
.NET Core 2.1 2018/05/30
.NET Core 3.0 2019/09/23

8. .NET Core 2.0

9. .NET Core 3.0

10. Performance improvements

11. Get Span (Read Only)

12. Pin Span

13. EndsWith

14. Trim

15. Reverse

16. HtmlDecode

17. Parse To Int 32

18. Mod and other operations

19. ToString

20. Get Current Thread

21. SignalR Improvements

22. Automatic Reconnect - SignalR

23. Automatic Reconnect - SignalR

24. New Endpoints for Web App

25. Blazor

26. What is Microsoft Blazor?
• Single Page Application of .NET Platform
• Based on WebAssembly and not in Javascript
• Started as a open-source project and now it is
officially part of .NET Stack
• Quick improvements and updates since 2017

27. • Single Page Application of .NET Platform
• Based on WebAssembly and not in Javascript
• Started as a open-source project and now it is
officially part of .NET Stack
• Quick improvements and updates since 2017
What is Microsoft Blazor?

28. Blazor App

29. Blazor App Template

30. Blazor benefits
• Easy adoption by .NET developers
• Uncomplicated to learn
• All .NET resources already available
• Performance
• Compatible with all modern browsers
• Can be hosted in a very low cost service
• Re-use of code in client-side (validation, logic and
more)
• The client-side Blazor application works off-line

31. New Features in C# 8.0

32. HTTP/2 and New Features in C# 8.0
• Async Streams
• Switch expressions
• In-box Json Reader
• Span<T> improvements

33. Entity Framework 3.0
• Smarter Linq Queries
• Improvements on Many to
Many
• Scaffold for Views
• Cosmos Db

34. Self-contained EXE

35. Self-contained EXE

36. Questions

37. Thank you !!!

38. Contact Info
Medium.com/@alexandre.malavasi
LinkedIn.com/in/alexandremalavasi
Twitter.com/alemalavasi