count的值

count的值为4

 public class Demo    {      public  static int count = 0;        static Demo()        {            count++;        }        public Demo()        {            count++;        }        static void Main(string[] args)        {            Demo demo = new Demo();            Demo demo2 = new Demo();            Demo demo3 = new Demo();            Console.WriteLine(count);            Console.ReadKey();        }    }