static void Main(string[] args)
{
//Simple Singleton
SimpleSingleton simpleSingleton = SimpleSingleton.GetInstance();
simpleSingleton.ShowMessage("simple singleton");
SimpleSingleton simpleSingleton2 = SimpleSingleton.GetInstance();
if (simpleSingleton == simpleSingleton2)
{
Console.WriteLine("This is the same instance");
}
//Thread Safe Singleton, call from the master thread
ThreadSafeSingleton threadSafeSingleton = ThreadSafeSingleton.GetInstance();
threadSafeSingleton.ShowMessage("thread safe singleton");
ThreadSafeSingleton threadSafeSingleton2 = ThreadSafeSingleton.GetInstance();
if (threadSafeSingleton == threadSafeSingleton2)
{
Console.WriteLine("This is the same instance");
}
//Get object from different threads.
Parallel.For(0, 10000, (i) =>
{
ThreadSafeSingleton threadSingleton = ThreadSafeSingleton.GetInstance();
ThreadSafeSingleton threadSingleton2 = ThreadSafeSingleton.GetInstance();
if (threadSingleton != threadSingleton2)
{
throw new Exception("The threads broke the program");
}
});
}
static void Main(string[] args)
{
// Lazy Initialization Singleton Design Pattern
LazyInitializationSingleton lazyInitializationSingleton = LazyInitializationSingleton.GetInstance();
lazyInitializationSingleton.TestInstance();
// Eager Initialization Singleton Design Pattern
EagerInitializationSingleton eagerInitializationSingleton = EagerInitializationSingleton.GetInstance();
eagerInitializationSingleton.TestInstance();
// Thread Safe Singleton Design Pattern
ThreadSafeSingleton threadSafeSingleton = ThreadSafeSingleton.GetInstance();
threadSafeSingleton.TestInstance();
}