static void Main(string[] args)
{
Adam adam = Adam.GetInstance();
Eve eve = Eve.GetInstance(adam);
Console.WriteLine(adam.Name);
Console.WriteLine(eve.Name);
Console.ReadLine();
}
public static Eve GetInstance(Adam adam)
{
lock (locker)
{
if (adam == null)
{
throw new ArgumentNullException();
}
if (uniqueInstance == null)
{
uniqueInstance = new Eve("Eve");
}
return(uniqueInstance);
}
}