Error when updating Xamarin Forms 5

DuncanCole

I've got a project that was on 4.8 and I thought I'd update in 5.0 today but after fixing a few things (getting the Community Toolkit for the Expander for example) and building it crashes on startup. Specifically I'm getting this error:

Method not found: bool Xamarin.Forms.Internals.ResourceLoader.get_IsEnabled()'

I've done a clean and build as well as a complete delete of the bin/obj files.

DuncanCole

Correction: I am upgrading from 4.6

Yelinzh

1.These Expander feature has been (or will be soon) migrated to the Xamarin Community Toolkit. Please add the latest Xamarin Community Toolkit to your project, make sure resolve the new namespaces in the sample and complie your project again.

Check the doc:
https://docs.microsoft.com/en-us/xamarin/xamarin-forms/release-notes/5.0/5.0.0#c-ui-expander-and-mediaelement-moved

Method not found: bool Xamarin.Forms.Internals.ResourceLoader.get_IsEnabled()'

2.Where did you call the ResourceLoader.get_IsEnabled method? The Internals.ResourceLoader class add the IsEnabled property in Xamarin.Forms 5, try using it instead.

Related link:
https://docs.microsoft.com/en-us/xamarin/xamarin-forms/release-notes/5.0/5.0.0-api#type-changed-xamarinformsinternalsresourceloader

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Yelinzh

@DuncanCole Pleaes make sure you've also update the Xamarin.Forms package on each platform project. On Android, it requires to set the TargetFramework 10.0.

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