public void AddTravel(Travel travel)
{
Travel newTravel = TravelsList.FirstOrDefault(x => x.Id == travel.Id);
if (newTravel == null)
{
TravelsList.Add(travel);
}
else
{
newTravel.Copy(travel);
}
}
public void RemoveTravel(Travel travel)
{
TravelsList.Remove(travel);
}
