This document discusses Xamarin, a platform for building mobile apps using C# and .NET. It can be used to build apps for iOS, Android, and Windows Phone from shared C# code, while still allowing full access to native platform APIs. The document promotes features like hot reloading for faster development cycles and high performance from ahead-of-time compilation to ARM binaries or just-in-time compilation. Statistics are provided on code reuse between platforms for sample Xamarin apps. James Montemagno of Xamarin encourages questions from attendees.

1. #XamarinDevDays
Xamarin.com
Welcome to
github.com/xamarin/dev-days-labs

3. James
Montemagno
Developer Evangelist, Xamarin
james@xamarin.com http://motzcod.es/ @JamesMontemagno

4. DESIGN – DEVELOP -‐ INTEGRATE TEST MONITOR
LEARN

5. Shared C# codebase • 100% native API access • High performance
iOS C# UI Windows C# UIAndroid C# UI
Shared C# Mobile

6. Shared C# codebase • 100% native API access • High performance
iOS C# UI Windows C# UIAndroid C# UI
Shared C# Mobile C# Server
Linux/Mono
CoreCLR
Azure
Shared C# Client/Server

7. Shared C# or F# codebase • 100% native API access • High performance
iOS F# UI Windows F# UIAndroid F# UI
Shared F# Mobile F# Server
Linux/Mono
CoreCLR
Azure
Shared F# Client/Server

8. Microsoft.Phone Microsoft.Networking Windows.Storage Windows.Foundation Microsoft.Devices
System.Data System.Windows System.Numerics System.Core System.ServiceModel
System.Net System System.IO System.Linq System.Xml

9. MapKit UIKit iBeacon CoreGraphics CoreMotion
System.Data System.Windows System.Numerics System.Core System.ServiceModel
System.Net System System.IO System.Linq System.Xml

10. Text-to-speech ActionBar Printing Framework Renderscript NFC
System.Data System.Windows System.Numerics System.Core System.ServiceModel
System.Net System System.IO System.Linq System.Xml

11. 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

13. ✓Always Up-to-Date
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16. High Speed Android Emulator
• Mac or PC
• Runs side-by-side Windows
Phone Emulator
Free for Xamarin Subscribers:
• Xamarin.com/Android-Player

18. Xamarin.iOS Xamarin.Android

21. Mac
iOS
Android
Windows Phone
Calca iCircuit Touch Draw
86%
14%
72%
28%
77%
23%
70%
30%
61%39%
94%
6%
88%
12%
76%
24%
90%
10%

23. Shared C# codebase • 100% native API access • High performance
iOS C# UI Windows C# UIAndroid C# UI
Shared C# Mobile

24. Thank you.
James
Montemagno
Developer Evangelist, Xamarin
james@xamarin.com motzcod.es @JamesMontemagno
Questions?