Microsoft Visual Studio Enterprise 2017
Version 15.8.5
VisualStudio.15.Release/15.8.5+28010.2036
Microsoft .NET Framework Version: 4.7.03056
AvaloniaPackage Extension version: 1.0
Did you build your project first?
Yes
"Restart" and "Reload solution info" don't fix anything
Hmmm, perhaps @kekekeks might have an idea
Also the XAML editor from AvaloniaUI projects has this tab, but UWP and WPF editor don't

Does VS recognize Avalonia XAML as XML?
I have same issue. MS VS Community 2017 15.8.7.
I have installed Avalonia for Visual Studio.
Same issue on VS Community 2017 and avalonia for vs 0.7
same issue here i think it has started week or 2 ago, may be when 0.7 was released
should be fixed in https://github.com/AvaloniaUI/AvaloniaVS/pull/76
look like issue is with 15.8 + version of visual studio https://developercommunity.visualstudio.com/content/problem/319949/icompletionsourceprovider-not-getting-called-anymo.html
I have been playing with Avalonia UI in VS 15.9.4. The completion is rather painful compared to the WPF one at least. Some examples:
Space to complete a tag name it doesn't insert the space.Space to complete a property name the carot ends up after the last double quote.= to complete a property: it doesn't complete the name it just has whatever you have typed so far; it doesn't close the completion window and the only suggestions is the property name you just selected./ to complete a self-closing tag it doesn't insert />.Hello. I'm having this problem in new machines, but my computer from home has auto-complete working fine. Is there any way I can help?
Hi @lock9 I'm currently working on improving the intellisense completion in a new version of the designer. I'll let you know when I have something you can try out!
Intellisense should now be greatly improved with more improvements coming. Closing this: if there are any more problems please file them in our VS extension repo: https://github.com/AvaloniaUI/AvaloniaVS