Getting StoreReview Plugin to work

Hi All, I installed the James Montemagno Plugin nuget

https://github.com/jamesmontemagno/StoreReviewPlugin

And I call it using

using Plugin.StoreReview;
'
'
'public override View OnCreateView(,,,,,,,
private StoreReviewImplementation store = new StoreReviewImplementation();
store.RequestReview();

The code compiles, it runs, but nothing happens.

Can someone please point me in the right direction

Thanks