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I have a Xamarin.Forms project, and it worked just fine until I updated my Xamarin Studio Community to latest 5.10.3 (build 51) and updated Xamarin.Forms to 2.2.0.31

When I compile my android project, it showed me 

"mynamespace.Droid.Resource.Attribute" does not contain a definition for "actionBarSize"

I did not change anything after upgrade and it works before, I know some others faced the same problem like me when I search on google, seems no one asked this in stackoverflow yet so I would like to get some help here.

Li Cheuqar
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2 Answers2

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  1. Delete Bin and Obj folders in project folder
  2. Delete contents of C:\Users\{your username}\AppData\Local\Xamarin\zips
  3. Rebuild project
    This will take a while because Xamarin will re-download the required files. It should work after it's done.
Ryan M
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Jojo Appiah
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That's a bug listed here. There are different workarounds about this, please try:

Failed to use Android Support Library v4

Creating a Hello World in Visual Studio with Xamarin Forms Fails

Xamarin cross-platform (portable class) project compilation error

Community
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Luis Beltran
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