class Program    {        static void Main(string[] args)        {            //ArrayList list = new ArrayList()             //{             //new Person(){Name="科比",Age=35},            //new Person(){Name="詹姆斯",Age=30},            //new Person(){Name="叶长种",Age=25},            //};            //list.Sort();            //for (int i = 0; i < list.Count; i++)            //{            //    Person p= list[i] as Person;            //    Console.WriteLine(p.Name);             //}            //Console.ReadKey();            int[] nums = {3,5,2,6,9,1 };            for (int i = 0; i < nums.Length; i++)            {                for (int j = nums.Length-1; j > i; j--)                {                    //if (nums[j].CompareTo(nums[j-1])<0)                    //{                    //    int n = nums[j];                    //    nums[j]=nums[j-1];                    //    nums[j - 1] = n;                    //}                    IComparable com =(IComparable)nums[j];                    if (com.CompareTo(nums[j - 1]) < 0)                    {                        int n = nums[j];                        nums[j] = nums[j - 1];                        nums[j - 1] = n;                    }                }              }            for (int i = 0; i < nums.Length; i++)            {                Console.WriteLine(nums[i]);            }            Console.ReadKey();                    }    }    public class Person:IComparable    {        public string Name        {            get;            set;        }        public string Email        {            get;            set;        }        public int Age        {            get;            set;        }        public int CompareTo(object obj)        {            Person p = obj as Person;            return this.Age - p.Age;        }    } 

 class Program    {        static void Main(string[] args)        {            //int n = 10;            //string s = n.ToString();//不是装箱            //int m = int.Parse(s);//不是拆箱            //object o = n;//装箱            //int x = (int)o;//拆箱            //Console.WriteLine(m);            //在IL语言中出现 box unbox            int n = 10;            object o = n;            int m = (int)o;            Console.WriteLine(m);            Console.ReadKey();        }    }

 class Program    {        static void Main(string[] args)        {            //Chinese ch1 = new Chinese();            //Person p = ch1;//没有发生装箱，因为都是引用类型            //Chinese ch2 =(Chinese)p;            //double d = 999.9;            //object o = d;            //double d1 = (double)o;//装箱            //Console.WriteLine(d1);//拆箱，输出999.9            //Console.ReadKey();                      //int d = 999;            //object o = d;            //double d1 = (double)o;//装箱            //Console.WriteLine(d1);//发生异常，装箱时整型拆箱也必须是整型            //Console.ReadKey();            //int n = 10;            //IComparable com = n;//发生了装箱 接口都是引用类型            //int m = (int)com;            //Console.WriteLine(m);            //Console.ReadKey();            int n = 10;            Console.WriteLine(n);            object o = n; //装箱            Console.WriteLine((int)o);//拆箱            Console.WriteLine(o);            Console.ReadKey();        }    }    public class Person    {        public string Name        {            get;            set;        }        public string Email        {            get;            set;        }        public int Age        {            get;            set;        }    }    public class Chinese : Person    {       }

    class Program    {        static void Main(string[] args)        {            int n = 100;            M1(n);    //调用void M1(double d)  没有去装箱            string s1 = "a";            double d1 = 10;            string s2 = "b";            int n1 = 9;            string full = s1 + d1 + s2 + n1;// 装箱两次，d1 和 n1            Console.WriteLine(full);                        Console.ReadKey();        }        private static void M1(double d)        {            Console.WriteLine(d);        }        private static void M1(object o)        {            Console.WriteLine(o);        }    }

   class Program    {        static void Main(string[] args)        {            int n = 10;            object o = n;//装箱一次            n = 100;            Console.WriteLine(n+","+(int)o);  //装了两次 拆了一次                      Console.ReadKey();        }    } 

  class Program    {        static void Main(string[] args)        {            //ArrayList arriList = new ArrayList();            //Stopwatch watch = new Stopwatch();            //watch.Start();            //for (int i = 0; i < 1000000; i++)            //{            //    arriList.Add(i);            //}            //watch.Stop();            //Console.WriteLine(watch.Elapsed);//00:00:00.99816            //Console.ReadKey();            List<int> arriList = new List<int>();            Stopwatch watch = new Stopwatch();            watch.Start();            for (int i = 0; i < 1000000; i++)            {                arriList.Add(i);            }            watch.Stop();            Console.WriteLine(watch.Elapsed);//00:00:00.014241            Console.ReadKey();        }    }