Is there any documentation available for migrating from ArcGIS Engine to ArcGIS Runtime in terms of code? I am aware of the existence of "ArcGIS Runtime: Migrating from ArcGIS Engine" videos but they do not provide code examples and I need some coding documentation, for example which classes in Runtime correspond to the classes in Engine, etc. Any help is appreciated, thanks in advance.
Engine and Runtime are two vastly different architectures, so a one-to-one mapping of classes is going to be really tough / impossible. Also you might be looking at changing the approach or workflows to solve certain use-cases. I'd recommend you install the WPF Sample Viewer (https://www.microsoft.com/store/productId/9MTP5013343H) and find samples that shows how to do various workflows you're looking to duplicate and study the code behind each sample.