Answer by ish1313 for How to update the model when using database first approach

you may

1. rename folder with scaffolded clasess let's say model->model1
2. scaffold database with original command
3. delete model1 folder

but if you have any changes in /model folder you will lose them. i am keeping /Model folder nearly intact and have all changes in /Partial folder (partial classes).

the only thing i need to change manually after rescaffolding isto remove constructor and onconfiguring (etc) from newly created dbcontext class, because i am keeping this code in partial class