public static Eve GetInstance(Adam adam)
{
if (instance == null)
{
instance = new Eve(adam, "Eve");
}
return(instance);
}
public static Adam GetInstance()
{
if (instance == null)
{
instance = new Adam("Adam");
}
return(instance);
}
private Eve(Adam adam, string name) : base(name)
{
adamInstance = adam ?? throw new ArgumentNullException();
}