public static SingletonDemo getInstance()
{
if (instance == null)
{
instance = new SingletonDemo();
}
return(instance);
}
static void Main(string[] args)
{
//SingletonDemo gotInstance = SingletonDemo.getInstance();
SingletonDemo singletonDemo = new SingletonDemo();
MyDeligate myDeligate = new MyDeligate(singletonDemo.Sumation);
int res = myDeligate(2, 3);
Console.WriteLine(res.ToString());
}