public override bool Validate()
{
return
(_Entries.Count > 0 &&
Entries.All(e => e.IsValid) &&
_TaxType != null &&
_PlaceType != null &&
_Account != null);
}
public bool Equals(AirbusPerfTable a, double delta)
{
return(Entries != null && a.Entries != null &&
Entries.Count == a.Entries.Count &&
Entries.All(x => a.Entries.Any(y => x.Equals(y, delta))));
}