public Human(string name, Female mother, Male father) : this(name)
{
if (mother == null || father == null)
{
throw new ArgumentNullException();
}
this.Mother = mother;
this.Father = father;
}
public static Eve GetInstance(Male adam)
{
if (adam == null)
{
throw new ArgumentNullException();
}
if (instance == null)
{
instance = new Eve(adam);
}
return(instance);
}
public Female(string name, Female mother, Male father) : base(name, mother, father)
{
}
private Eve(Male adam) : base("Eve")
{
}
