1.
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KYIV 2019
.NET Core 3 and the future
of .NET platforms
.NET CONFERENCE #1 IN UKRAINE
Olia Gavrysh

2.
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.NET LEVEL UP
About me
.NET CONFERENCE #1 IN UKRAINE KYIV 2019
Olia Gavrysh
Program Manager
Microsoft, .NET team
twitter: @oliagavrysh

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.NET LEVEL UP
Agenda
.NET CONFERENCE #1 IN UKRAINE KYIV 2019
1. About .NET Core
2. What’s new in .NET Core 3.0
3. Future of .NET

4.
Your platform for building anything
DESKTOP WEB CLOUD MOBILE GAMING IoT AI
.NET

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.NET LEVEL UP
.NET Core – How it started
.NET CONFERENCE #1 IN UKRAINE KYIV 2019
2002 - .NET Framework 1.0
2016 - .NET Core 1.0

6.
.NET LEVEL UP
.NET Core became popular
.NET CONFERENCE #1 IN UKRAINE KYIV 2019
Just a few of our millions of .NET users…
dot.net/customers

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.NET LEVEL UP
.NET Core Differentiators
.NET CONFERENCE #1 IN UKRAINE KYIV 2018
 Light and fast
 Deployment flexibility
● side-by-side
● self-contained
● single .exe
● Trimmer
 SDK-based project files
 Fundamental runtime
improvements
 New language features

8.
.NET Core 3.0
Released on 9/23
Desktop support for WPF and WinForms
Full-stack web development with C# and Razor
Significant performance improvements
New C# language features for productivity and less errors
https://dotnet.microsoft.com/download/dotnet-core/3.0

9.
What’s new in .NET Core
KYIV 2019 .NET CONFERENCE #1 IN UKRAINE

10.
C# 8
KYIV 2019 .NET CONFERENCE #1 IN UKRAINE

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.NET LEVEL UP
What’s new in C# 8
.NET CONFERENCE #1 IN UKRAINE KYIV 2019
• Nullable reference types
• Recursive patterns
• Async enumerable
• Indices and Ranges
• Default interface members
• Target-typed new-expressions
• Switch expressions
• Using statements
• Static local functions
• Readonly members
• Null coalescing assignment
• Unmanaged constraint
• Interpolated verbatim strings
• …

12.
Let’s talk about {null}

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.NET LEVEL UP
Async Enumerable
.NET CONFERENCE #1 IN UKRAINE KYIV 2019

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Default interface members

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Indices and Ranges
Index i1 = 3; // number 3 from beginning
Index i2 = ^4; // number 4 from end
int[] a = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };
Console.WriteLine($"{a[i1]}, {a[i2]}"); // "3, 6"
var slice = a[i1..i2]; // { 3, 4, 5 }
var slice = a[..i2]; // { 0, 1, 2, 3, 4, 5 }
Indices
Ranges

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Target-typed new and switch expressions

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.NET LEVEL UP
What’s new in C# 8
.NET CONFERENCE #1 IN UKRAINE KYIV 2019
• Nullable reference types
• Recursive patterns
• Async enumerable
• Indices and Ranges
• Default interface members
• Target-typed new-expressions
• Switch expressions
• Using statements
• Static local functions
• Readonly members
• Null coalescing assignment
• Unmanaged constraint
• Interpolated verbatim strings
• …

18.
Web Development
with Blazor
KYIV 2019 .NET CONFERENCE #1 IN UKRAINE

19.
https://...
JS

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Blazor
• Build client-side web UI with .NET instead of JavaScript
• Write reusable web UI components with C# and Razor
• Share .NET code with both the client and the server
• Call into JavaScript libraries & browser APIs as needed
C#

21.
.NET

22.
How Blazor WebAssembly works
https://...
DOM
Razor Components
.NET
WebAssembly

23.
Blazor on client or server
https://...
DOM
Razor Components
.NET
WebAssembly
https...
DOM
.NET Core
SignalR
Blazor WebAssembly Blazor Server
Razor Components
.NET
.NET Core 3.0May 2020

24.
Blazor on client or server
Blazor WebAssembly Blazor Server
.NET Core 3.0May 2020

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Get started with Blazor
https://blazor.net
• Install .NET Core 3.0
• Install the Blazor WebAssembly template
• (Windows) Install Visual Studio 2019 16.3
• (Mac/Linux) Install Visual Studio Code with the C# extension
.NET LEVEL UP .NET CONFERENCE #1 IN UKRAINE KYIV 2019

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The “Awesome Blazor” community
https://aka.ms/awesomeblazor
• Free open-source components & JS interop libraries
• Samples, articles, videos, etc.
• Blazor community on Gitter: https://gitter.im/aspnet/blazor

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More about Blazor at .NETFest
Day 2: 11:25 Day 2: 13:20

28.
Desktop
KYIV 2019 .NET CONFERENCE #1 IN UKRAINE

29.
Deployment Flexibility
Side-by-side deployment, self-
contained EXEs
Install machine global or app local
framework
Windows 10
Access modern Windows 10
APIs from WPF and WinForms
Use native Windows 10
controls via XAML islands
Open Source
WPF and WinForms projects
also open source on GitHub
Develop together with open
source community
.NET Core 3.0 for Windows Desktop

30.
Appcenter.ms

31.
To port or not to port?
.NET CONFERENCE #1 IN UKRAINE KYIV 2019.NET LEVEL UP
Only
maintenance,
no active
development
Active
development,
new apps
Stay on
Framework
Try Core

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Porting tool
Try Convert
• https://github.com/dotnet/try-convert
• Will try to convert your old-style project file to the new SDK-style
and retarget your executables to .NET Core 3

33.
Microservices
• gRPC
• Worker Service
• Web API’s + Identity
Machine Learning
• Model Builder
• TF integration
• DB loader
IoT
• Raspberry Pi
• Containers
• GPIO pins APIs
Xamarin
• Preview Hot Reload
& Hot Restart

34.
Future of .NET Platforms

35.
XAMARIN / MONO.NET FRAMEWORK .NET.NET CORE
.NET STANDARD

36.
July 2019
.NET Core 3.0
RC
Sept 2019
.NET Core 3.0
Nov 2019
.NET Core 3.1
LTS
Nov 2020
.NET 5.0
Nov 2021
.NET 6.0
LTS
Nov 2022
.NET 7.0
Nov 2023
.NET 8.0
LTS

37.
.NET 5
INFRASTRUCTURE
.NET STANDARD
.NET – A unified platform
DESKTOP WEB CLOUD MOBILE GAMING IoT AI
WPF
Windows Forms
UWP
ASP.NET Xamarin UnityAzure ARM32
ARM64
ML.NET
.NET for
Apache Spark

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KYIV 2019
Thank you!
twitter: @oliagavrysh