1. Make sure you download the latest extras as well as the Android 5.0 (API 21) SDK via the Android SDK Manager.
2. Ensure that you are compiling your application for compileSdkVersion = 21. You can optionally specify the targetSdkVersion = 21 as well.
3. If you require a previous version such as API 19, please download the respective version found on the Nuget page:
Note: If you manually install this via Package Manager Console, make sure you also install the same version of Xamarin.Android.Support.v4
SO Reference: http://stackoverflow.com/questions/26431676/appcompat-v721-0-0-no-resource-found-that-matches-the-given-name-attr-andro
Android.Support.v7.AppCompat - No resource found that matches the given name: attr 'android:actionModeShareDrawable'
Last Updated: Oct 21, 2016 05:43PM EDT