I am attempting to run a Hello World example from the following tutorial: https://mva.microsoft.com/en-US/training-courses/xamarin-for-absolute-beginners-16182
You can follow this blog to resolve it https://agilehobo.wordpress.com/2016/08/24/2-ways-to-resolve-unsupported-major-minor-version-52-0-when-building-xamarin-android-app/