Xamarin Inspector & Workbooks 1.2 release notes

Xamarin Workbooks & Inspector provide interactive tools for learning, experimenting, and even modifying your running app.

Refer to full product documentation for more details:

This is a significant update to the 1.1 release with some new features and bug fixes. An overview of changes since the 1.1 release is below.

FIXED IN 1.2.2

  • Markdown text on Windows now properly reacts to font size preference changes.

  • Launching the Inspector will no longer bring up multiple instances per target application.

  • The visual tree will now refresh on Windows as it does on Mac when switching between different Workbook target platforms.

  • Fixed a regression where the property editor on Windows could only update a value once.

  • Typing into the REPL in Inspector mode was broken after using the clear command.

  • Capture(UIView) for iOS now renders the view's subviews, matching the behavior of other target platforms.

  • The Mac package now comes with a command line tool to completely uninstall Workbooks & Inspector, located at /Library/Frameworks/Xamarin.Interactive.framework/Versions/Current/uninstall

  • When reading release notes in the Mac updater, links will now open in the default browser as one would expect.

FIXED IN 1.2.1

  • When adding the Newtonsoft.Json NuGet to a workbook, the version will be fixed to 9.0.1 to work around a compatibility issue with 10.0 or newer. Full compatibility with 10.0 and newer will come in a subsequent major update to Workbooks. More details.

  • Setting System.Threading.CurrentThread.CurrentCulture or System.Globalization.CultureInfo.CurrentCulture will again persist across cells. More details.

  • Code tooltip text now renders properly on macOS 10.12 and later.


  • Workbooks and Inspector are now powered by Roslyn 2.0 with support for C# 7, including built-in support for tuples via System.ValueTuple. Be sure to try the "What's new in C# 7" workbook!

  • Inspector now supports complex spatial view transforms, including rotation and scaling in 3D, when supported by the underlying platform. The 3D representation has also been extended to visualize these transforms.

  • Support for sublayers on iOS and macOS. Inspector now descends deeper into layer hierarchy and allows you to visualize sublayers in the 3D representation.

  • Xamarin.Forms integration for Workbooks is much improved. The integration will now initialize Xamarin.Forms for you, set up a base Application.Current, and set a blank ContentPage as its main page. Xamarin.Forms workbooks are now cross-platform, as we've trimmed the set of generated references and you no longer need platform-specific initialization code.

  • A new Image function is available that can accept a URL or a path relative to the Workbook's current directory to display the contents of the image as the result of the cell.

  • Code cells now show cell-relative line numbers to be of assistance when reading error and warning diagnostics. This feature is enabled by default and can be disabled in the Preferences dialog.

  • All cell executions are now timed using a Stopwatch and displayed nicely at the top right of the cell editor in either seconds, milliseconds, or microseconds. This feature is disabled by default and can be enabled in the Preferences dialog.

  • Console output is now pushed asynchronously and can render during cell execution. Previously all captured console output was batched and rendered only when execution completed. This is particularly useful for long-running async cells.

  • In the Inspector, REPL history saving can be turned off in the Preferences dialog. History can also now be cleared. Saving is now supported on Windows.

  • Android workbooks now require an Android virtual device targeting at least Android 5.0. Previously, Android 4.4 devices were supported.


  • NuGet packages are now supported for Android Workbooks and iOS Workbooks on Windows.

  • C# dynamic is now supported without having to explicitly reference Microsoft.CSharp.

  • Code cells that await a non-generic Task will no longer show null as a result.

  • The Windows installer now bundles its own iOS support for Workbooks. It is no longer necessary to have a matching version of Workbooks installed on the Mac build host for supporting iOS Workbooks from Windows. Live iOS app inspection from Visual Studio still requires a matching install on the Mac build host, though.

  • Result object introspection is now deferred until the "Object Members" result renderer is selected. This speeds up sending the default representation of a result for very large objects.

  • Xamarin.Forms integration for iOS inspection and Workbooks is now available on Windows clients.

  • The modal stack in Xamarin.Forms is now properly represented in the view inspector, in addition to the navigation stack.

  • Package manager list items can now be activated via double-click.

  • ARM-based Android emulators will no longer be tried for Android workbooks. This will greatly improve Android emulator startup time if many ARM emulators were installed.

  • You can now set how frequently Workbooks and Inspector will check for updates. Additionally, on Windows, you can now specify your preferred update channel in the Preferences dialog; on Mac however, this setting is still driven by the IDE.


  • Any non-Workbooks YAML metadata in workbook manifests will now be semantically preserved when saving.

  • Framework assemblies can now be referenced from Android workbooks.

  • NuGet packages now restore properly when changing agents while a workbook is open.

  • Getting the visual tree could sometimes cause the app to crash on Android when inspecting a Xamarin.Forms app.

  • Fixed a reconnect issue for iOS Workbooks on Windows.

  • Workbooks' working directories should now stay in sync even when multiple workbooks of the same type are open.


  • NuGet Limitations
    • Native libraries are supported only on iOS, and only when linked with the managed library.
    • Packages which depend on .targets files or PowerShell scripts will likely fail to work as expected.
    • To remove or modify a package dependency, edit the workbook's manifest with a text editor. Proper package management is on the way.