Hi David C,
Welcome to our forum.
Based on your description, I think your main concern is how to get your Image through your
ResourceDictionary, if I have misunderstood your concern, please let me know.
I think if you want to get your Image as a Source through your ResourceDictionary, why not store your Image as Resource into your
ResourceDictionary, for example:
And then you could get it using:
Control.Source = (ImageSource)FindResource("someImage");
On the other hand, I think you coud try to define your template.xaml with a key, and then you could get it through the key, this
Article demonstrating you how to use this way to
achieve your goal, the link is: