object association parent management

Suppose you have the following association:​

SQLINQ will generate support for the master-child association by creating:

• SolarSystem   Ship.TheSolarSystem
• IList<Ship>   SolarSystem.Ships

In order to manage the two lists, you simply say:

• myShip.TheSolarSystem = mySolarSystem;

And the system will automatically remove "mySolarSystem" from the current list it is assigned to, and reassign it to the IList on mySolarSystem, assuming both objects are not null.  This is the code it generates:

public SolarSystem TheSolarSystem { 
    get { return _TheSolarSystem.Value; } 
    set { 
        if ( _TheSolarSystem.Value != value ) {

            // Remove the reference of this instance in the original parent's list
            if ( _TheSolarSystem.Value != null ) 
                _TheSolarSystem.Value.Ships.Remove( this )  // Ignored if not present or loaded

            _TheSolarSystem.Value = value; 

            // Add this to the new parent's list
            if ( _TheSolarSystem.Value != null )
                _TheSolarSystem.Value.Ships.Add( this );

            IsDirty = true;
        }
    } 
}