public void ApplyStateChanges()
{
foreach (var dbEntityEntry in ChangeTracker.Entries())
{
var entityState = dbEntityEntry.Entity as IObjectState;
if (entityState == null)
{
throw new InvalidCastException("All entites must implement the IObjectState interface, " +
"this interface must be implemented so each entites state can explicitely determined when updating graphs.");
}
dbEntityEntry.State = GenericHelpers.ConvertState(entityState.State);
}
}