public void CheckCounter()
{
LazySingleton firstInstance = LazySingleton.getInstance();
firstInstance = LazySingleton.getInstance();
Assert.AreEqual(1, firstInstance.getCounter());
}
//返回对象
public static LazySingleton getInstance()
{
// 判断如果对象不为null，就不用进入同步块，这样可以提高性能
if (singleton == null)
{
//判断对象为null，才创建对象
singleton = new LazySingleton();
}
return(singleton);
}
static void Main(string[] args)
{
Console.WriteLine("饿汉式单例模式");
Console.WriteLine();
//通过new实例化会报错
Singleton g = new Singleton();
//只能通过getInstance得到对象
Singleton g1 = Singleton.getInstance();
Console.ReadKey();
Console.WriteLine("懒汉式单例模式");
Console.WriteLine();
Console.WriteLine("单线程环境");
for (int i = 0; i < 10; i++)
{
LazySingleton singleton = LazySingleton.getInstance();
}
Console.ReadKey();
}