Presented by: Sam Basu, Progress Software Presented at All Things Open 2020 Abstract: has come a long way, enabling developers to build truly native & truly cross-platform apps across various platforms with OSS tools. The latest in Xamarin.Forms showcases increased developer productivity, matured tooling and easy code sharing across platforms. Let’s do a whirlwind tour of the hottest features, like • Shell & Navigation • Visual & Design themes • Hot Reload & Hot Restart • Android X & iOS 13 support • Platform support with Tizen, WPF & Mac OS Also, you may be invested in OSS .NET and Xamarin technology stacks. But there are some pain points in the present reality. Perhaps you crave for cohesiveness, maturity and want to have more confidence in the .NET and Xamarin.Forms ecosystem? Let’s take a look at the future with .NET MAUI – the evolution of Xamarin.Forms. While early days, the promise is exciting. Developers would be able to write more cross-platform code to target a wider selection of platforms, across mobile/desktop/web. Major design patterns include traditional MVVM and also the newer MVU pattern for additional developer flexibility. MAUI also opens the funnel to invite more developers into the ecosystem by offering choices in the UI stack – web technologies are welcome. The tools you know get better, apps aim to be more performant and developer cycles get tighter loops. Let’s explore!

1. SamBasu|@samidip
DeveloperAdvocate|Progress
Evolution of Xamarin.Forms

4. Mobile Your Way
It’s 2020 | Developers have choices
2 Native
Hybrid
JS Native
X-Compiled
3
4
5
1 Mobile Web / PWA

5. The .NET Ecosystem

6. Compilers Languages Runtime components
COMMON INFRASTRUCTURE
.NET STANDARD LIBRARY
TOOLS
$_

8. The Xamarin Stack

9. Xamarin Democratizes .NET Mobile Development
Truly Native | Truly Cross-Platform

10. 3 Native User Interfaces
Shared App Logic
iOS C# Windows C#Android C#
Shared C# Logic

11. Shared User Interface
Shared App Logic
Shared C# Logic
Shared UI Code

12. When Xamarin.iOS & Xamarin.Android
1. Apps needing Native behaviors
2. Apps that use many Platform-specific APIs
3. Apps where custom UI is more important than code sharing
4. Apps that have complex Native UI renderings
5. Games
6. Forms Embedding options

13. When Xamarin.Forms
1. Apps needing little Platform-specific functionality
2. Apps where code sharing is more important than custom UI
3. Apps built by developers comfortable in XAML
4. LOB apps with lots of lists or data entry screens
5. Simple cloud-connected apps
6. Apps needing uniform UI across Platforms
7. Custom Renderers & Native Embedding options

15. Xamarin.iOS does full Ahead Of Time
(AOT) compilation to produce an ARM
binary for Apple’s App Store.
Xamarin.Android takes advantage of
Just In Time (JIT) compilation on the
Android device.
.NET
C#
Compile
and Link
.APK
Bindings
Runs
Natively
IL
+
JIT

17. Xamarin Productivity

18. ü Shell updates
ü New UI controls – CheckBox, CollectionView, CarouselView & more
ü Hot Reload & Hot Restart
ü Gradients & Brushes
ü Drag & Drop
ü Drawing Shapes & Paths
ü Flyout customization

21. The Outliers

22. Shared C# Logic
Shared UI Code

25. Marzipan/Catalyst

28. .NET MAUI

31. ü Simple but verbose markup
ü Extensibility
ü Solid Tooling
ü Rich Ecosystem

34. Modern UI for Xamarin

35. Complete Rich .NET Toolbox
Any App | Any Platform

36. Sharp Performant Polished UI .. For all your Xamarin Apps!
Telerik UI for Xamarin

37. Care for some Demos?

39. Let’skeepchatting|@samidip
Evolution of Xamarin.Forms
Thank You!