public Party()
{
CreationDate = DateTime.UtcNow;
Info = new PartyInfo();
Categories = new Category[0];
Guests = new Guest[0];
}
public void Update(PartyInfo info)
{
Name = info.Name != null ? info.Name : Name;
Description = info.Description != null ? info.Description : Description;
Address = info.Address != null ? info.Address : Address;
ExactDirections = info.ExactDirections != null ? info.ExactDirections : ExactDirections;
DateFrom = info.DateFrom.HasValue ? info.DateFrom : DateFrom;
DateTo = info.DateTo.HasValue ? info.DateTo : DateTo;
Budget = info.Budget.HasValue ? info.Budget : Budget;
}