private static void BigSetIsByIdentity()
{
using (IObjectContainer container = OpenDatabase())
{
City city = container.Query<City>()[0];
// #example: Note that the big-set compares by identity, not by equality
Person aCitizen;
using (IEnumerator<Person> aCitizenEnumerator = city.Citizen.GetEnumerator())
{
aCitizenEnumerator.MoveNext();
aCitizen = aCitizenEnumerator.Current;
}
Console.WriteLine("The big-set uses the identity, not equality of an object");
Console.WriteLine("Therefore it .contains() on the same person-object is "
+ city.Citizen.Contains(aCitizen));
Person equalPerson = new Person(aCitizen.Name);
Console.WriteLine("Therefore it .contains() on a equal person-object is "
+ city.Citizen.Contains(equalPerson));
// #end example
}
}
public bool IsCitizen(Person person)
{
return citizen.Contains(person);
}
public bool Equals(Person other)
{
if (ReferenceEquals(null, other)) return false;
if (ReferenceEquals(this, other)) return true;
return Equals(other.name, name);
}
private static void PrintCitizenStatus(City city, Person aPerson)
{
if (city.IsCitizen(aPerson))
{
Console.WriteLine(aPerson + " is a citizen");
}
else
{
Console.WriteLine(aPerson + " isn't a citizen");
}
}
