Resource related intellisense breaks after Rebuilding

[pjcollins]

Moving report from https://bugzilla.xamarin.com/show_bug.cgi?id=60880 into Issues. It looks like the clean target is still deleting designtime\Resource.Designer.cs in d15-6.

Steps to Reproduce

1. Create a new Single-View Android App
2. Open MainActivity.cs, and notice that both Resource.Layout.Main and Resource.ID.myButton are available in Intellisense
3. Select Build -> Clean Solution.
4. Resource.* related Intellisense no longer works as expected

Expected Behavior

Resource related Intellisense will continue to work after cleaning, building, rebuilding, etc.

Actual Behavior

The following IntelliSense output is displayed, and Resource related Intellisense no longer works.

[Failure] Could not find file 'c:\users\peter\source\repos\App16\App16\obj\Debug\designtime\Resource.Designer.cs'.

Version Information

VS 15.6 Preview 4:
https://gist.github.com/pjcollins/b8be35efd9b9eb0fb7e1355e74396fd2

Log File

https://gist.github.com/pjcollins/ee151a4e90f0d8ac7ec9d28984e52be7#file-gistfile1-txt-L1197-L1205

VS bug #627937

[dellis1972]

Hmm, Xamarin.Android.Windows.targets does not seem to be imported. Can you confirm it exists "somewhere" in the installation for windows?

[pjcollins]

I do have that targets file at the following location:
C:\Program Files (x86)\Microsoft Visual Studio\Preview\Enterprise\MSBuild\Xamarin\Android\Xamarin.Android.Common\ImportAfter\Xamarin.Android.Windows.targets

[dellis1972]

So weird. so why is that not being imported...

[dellis1972]

ok that log is the Clean target being run.. So its that target which is removing our designer file. And because IncrementalClean is not run as part of a Clean our targets are not running which would preserve the file.