//returns if there is flight restrictions from one country to another
public static bool HasRestriction(
Country from,
Country to,
DateTime date,
FlightRestriction.RestrictionType type)
{
FlightRestriction restriction =
GetRestrictions()
.Find(
r =>
(r.From == from || (r.From is Union && ((Union) r.From).IsMember(from, date)))
&& (r.To == to || (r.To is Union && ((Union) r.To).IsMember(to, date)))
&& (date >= r.StartDate && date <= r.EndDate) && r.Type == type);
//FlightRestriction res = GetRestrictions().Find(r => r.From == from && r.To == to && r.Type == type);
return restriction != null;
}
public static void AddRestriction(FlightRestriction restriction)
{
Restrictions.Add(restriction);
}