I'm very new to DNN. i write my first module in dnn 6, and it was just a simple one. now i want to write a module for dnn 7. i download dnn 7 c# DAL2 compiled module package, and change it to my format. but now i wonder if it's the best way i should do? i want to know which technology should i use in module developing for dnn 7. should i use MVC, or DAL2 is the best and last method to start a module?