//DOUBLE-CHECKED LOCKING
public static ChocolateFactory GetInstance()
{
if (_instance == null)
{
lock (typeof(ChocolateFactory))
{
if (_instance == null)
{
_instance = new ChocolateFactory();
}
}
}
return(_instance);
}
static void Main(string[] args)
{
ChocolateFactory cf = ChocolateFactory.GetInstance();
cf.Fill();
ChocolateFactory cf2 = ChocolateFactory.GetInstance();
cf.Boil();
cf2.Fill();
cf.Drain();
cf2.Fill();
cf2.Boil();
cf2.Drain();
Console.ReadKey();
}
