The document summarizes .NET Core, a cross-platform and open source development platform. It can be used to build desktop, web, mobile and cloud applications. .NET Core supports Visual Studio Code and Visual Studio IDE development environments on Windows, Mac and Linux. It has a large community of contributors and is widely adopted. The latest version is .NET Core 2.1 which provides improvements to performance, tools and new capabilities like Span and Memory. Blazor is a new web UI framework that runs C# code directly in the browser.

3. .NET Core Today

4. Free. Cross-platform. Open source.
A developer platform for building all your apps.
www.dot.net

5. DESKTOP WEB CLOUD MOBILE GAMING IoT AI
.NET
Your platform for building anything
Any platform…

6. Visual Studio Code
Open source, cross-platform editor with .NET support.
Visual Studio
A fully-featured, integrated development environment (IDE) for developing .NET apps
on a Windows PC development machine.
Visual Studio for Mac
A fully-featured IDE for developing .NET apps on a Mac OS development machine.
www.VisualStudio.com

7. We didn’t build
this alone.

8. “Samsung is embracing .NET because it is a completely
open source project.” — Samsung
".NET is open source; that allows us to contribute back
to it if we have any performance issues which
Microsoft review and together we make a better
product.“ — Illyriad Games
16,000+ Community Contributions from 3000+ Companies outside Microsoft

9. https://www.cncf.io/blog/2017/06/05/30-highest-velocity-open-source-projects/

10. “Using the same-size server, we were able to go from 1,000 requests per
second per node with Node.js to 20,000 requests per second with .NET Core.“
— Raygun
https://www.microsoft.com/net/customers
Data sourced from official tests available at TechEmpower Round 15.
Java Servlet .NET Core Node.js
2.22M
requests / sec0.73M
requests / sec
0.53M
requests / sec

11. #2 demanded primary technology
(LinkedIn)
.NET is a sought after job skill

14. .NET Core 2.1

15. •June 2016.NET Core 1.0
•March 2017.NET Core 1.1
•August 2017.NET Core 2.0
•In preview now.NET Core 2.1

16. Build
Performance
Global Tools
Span<T>,
Memory<T>
and friends

19. var arr = new byte[10];
Span<byte> bytes = arr; // Implicit cast from T[] to Span<T>
Span<byte> slicedBytes = bytes.Slice(start: 5, length: 2);
slicedBytes[0] = 42;
slicedBytes[1] = 43;
Assert.Equal(42, slicedBytes[0]);
Assert.Equal(43, slicedBytes[1]);
Assert.Equal(arr[5], slicedBytes[0]);
Assert.Equal(arr[6], slicedBytes[1]);
slicedBytes[2] = 44; // Throws IndexOutOfRangeException
bytes[2] = 45; // OK
Assert.Equal(arr[2], bytes[2]);
Assert.Equal(45, arr[2]);

20. [coreclr example

21. HttpClientFactory
Razor UI in class
libraries
Identity UI as a
library
GDPR SignalR

23. Blazor

24. • Native performance
any language
all major browsers
PCWorld Medium Linux.com

25. http://www.mono-project.com/news/2018/01/16/mono-static-webassembly-compilation/

27. Web page title
http://www.url.com
Memory
Management
Garbage
Collection
Graphics
Subsystems
HTML,CSS,
Canvas,Web GL,
Audio,Video
Storage
Cookies,
IndexedDb,
File API
Threading
Web Workers
Events
DOM Events,
Callbacks
Network
WebSockets,
XHR, Offline,
Realtime
Security
Sandbox, SSL,
CORS
APIs
GeoLocation,
Sensors

28. .cs .cshtml
.NET Core build system +
custom Razor compiler
App.dll
WebAssembly / asm.js
IL interpreter (Mono)
threads, GC, etc.
JS bridge
corlib.dll
Blazor.Runtime.dll etc.
Visible DOM
BROWSERHowBlazorworks

30. Component
model
Routing Layouts
Forms and
validation
Dependency
injection
Live reload
JavaScript
interop
Server-side
rendering
Debugging
(browser &
IDE)
Rich
IntelliSense
and tooling
Fallback to
asm.js
Publishing
App size
trimming

32. • Feb
• March
• April
• May

33. • Easy to get started
• Stable and consistent
• Modern innovative languages
• Industry leading tools
• Fast and scalable

35. Get Started Today!

36. It’s all free!
Runs side-by-side
Low impact install / uninstall

40. https://dot.net

41. https://aka.ms/dotnetcore21-getstarted

42. https://aka.ms/itkonekt-dotnet

43. Thanks!
Jon Galloway
jon.galloway@microsoft.com
@jongalloway
https://aka.ms/itkonekt-dotnet