"Are you missing a using directive or an assembly reference" in visual studio 2013

Question

Good Day everyone. I'm developing a Cross Platform Application in Xamarin.Forms when I encounter this error "Are you missing a using directive or an assembly reference". My project is working fine before I install a Nuget package (Circle Image View in Xamarin), but when I uninstall it (without changing a single line of code) the said error started to appear. I tried to Build, Rebuild it but still it does not work. Anything I can do to fix this? Any help will be appreciated. Thanks a lot.

These are the errors:

Error 1:

The type or namespace name 'Xamarin' could not be found (are you missing a using directive or an assembly reference?)

Error 2:

The type or namespace name 'Application' could not be found (are you missing a using directive or an assembly reference?)

Error 3:

The type or namespace name 'Xamarin' could not be found (are you missing a using directive or an assembly reference?)

Error 4:

The type or namespace name 'ContentPage' could not be found (are you missing a using directive or an assembly reference?)

Answer 1

It sounds like you're missing your Xamarin.Forms packages.

Can you expand your Packages directory in the Solution Explorer, and see if it's in there?

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Try this :

1. Select the project in the Solution tab
2. Select Project along the top menu
3. Select Add Nuget Packages...
4. Do a search for Xamarin.forms
5. Add Xamarin.forms to that project