Question

I need to set a relation between classes:

First class is a Route . Route has StartStation (Station class), and EndStation (Station class).

And every station could be start or end station for many routes.

Is it one-to-many relation?

If yes, how can I set that relation?

Giving EntitySet<Route> on the Station class makes no sense for me, but maybe I’m wrong?

Answer 1

I would guess that a single Station instance is reached by N Route instances, so the Station–Route relationship is one to many.

StartStation and EndStation would be roles that Station is playing in different routes. Each route has a start station and an end station, so the relationship would look something like this:

In such a way, I would advise that you set properties StartStation and EndStation as you just did, and having an EntitySet<Route> for each Station does actually make sense: is the collection of all routes that are related with that Station instance.