Uno.Windows-universal-samples/Samples/VersionAdaptiveCode/README.md

Version adaptive code sample

Shows ways of writing an app which adapts to the version of Windows it is running on, taking advantage of new features if available, and falling back to a simpler version if not.

Note: This sample is part of a large collection of UWP feature samples. If you are unfamiliar with Git and GitHub, you can download the entire collection as a ZIP file, but be sure to unzip everything to access shared dependencies. For more info on working with the ZIP file, the samples collection, and GitHub, see Get the UWP samples from GitHub. For more samples, see the Samples portal on the Windows Dev Center.

Specifically, this sample shows:

• Detecting whether a specific runtime class, property, event, method, or enumerated value is available.
• Executing code conditionally based on whether an API is present.
• Choosing between two versions of a control based on whether an API is present.
• Using a visual state trigger to set a property based on whether an API is present. (XAML only)

Note The Windows universal samples require Visual Studio 2017 to build and Windows 10 to execute.

To obtain information about Windows 10 development, go to the Windows Dev Center

To obtain information about Microsoft Visual Studio and the tools for developing Windows apps, go to Visual Studio

Related topics

Reference

ApiInformation class
HardwareButtons.CameraPressed event
BackgroundAccessStatus enumeration
OrientationSensor.GetDefault method
MediaElement
CreateBackdropBrush
AllowFocusOnInteraction property
MediaPlayerElement

Conceptual

Version adaptive code
Guide to UWP apps

Samples

OrientationSensor sample
BackgroundActivation sample
XamlStateTriggers sample

System requirements

Client: Windows 10

Server: Windows Server 2016 Technical Preview

Phone: Windows 10

Build the sample

1. If you download the samples ZIP, be sure to unzip the entire archive, not just the folder with the sample you want to build.
2. Start Microsoft Visual Studio 2017 and select File > Open > Project/Solution.
3. Starting in the folder where you unzipped the samples, go to the Samples subfolder, then the subfolder for this specific sample, then the subfolder for your preferred language (C++, C#, or JavaScript). Double-click the Visual Studio Solution (.sln) file.
4. Press Ctrl+Shift+B, or select Build > Build Solution.

Run the sample

The next steps depend on whether you just want to deploy the sample or you want to both deploy and run it.

Deploying the sample

• Select Build > Deploy Solution.

Deploying and running the sample

• To debug the sample and then run it, press F5 or select Debug > Start Debugging. To run the sample without debugging, press Ctrl+F5 or selectDebug > Start Without Debugging.