/// <summary>/// break 示例/// 在此例中，条件语句包含一个应该从 1 计数到 100 的计数器/// 但 break 语句在计数达到 4 后终止循环。/// </summary>static void Main(){for (int i = 1; i <= 100; i++){if (i == 5){break;}Console.WriteLine(i);}}

        /// <summary>/// continue 示例/// 在此示例中，计数器最初是从 1 到 10 进行计数 // 但通过将 continue 语句与表达式 (i< 9) 一起使用/// 跳过了 continue 与 for 循环体末尾之间的语句。/// </summary>static void Main(){for (int i = 1; i <= 10; i++){if (i < 9){continue;}Console.WriteLine(i);}}

        /// <summary>/// goto 示例/// 输入 2 /// 示例输出/// Coffee sizes: 1=Small 2=Medium 3=Large/// Please enter your selection: 2 /// Please insert 50 cents. /// Thank you for your business./// </summary>static void Main() {Console.WriteLine("Coffee sizes: 1=Small 2=Medium 3=Large");Console.Write("Please enter your selection: ");string s = Console.ReadLine();int n = int.Parse(s); int cost = 0; switch (n) {case 1: cost += 25; break; case 2:cost += 25; goto case 1;case 3:cost += 50;goto case 1; default:Console.WriteLine("Invalid selection.");break; } if (cost != 0){ Console.WriteLine("Please insert {0} cents.", cost);} Console.WriteLine("Thank you for your business.");}

        /// <summary>/// goto 示例2/// 下面的示例演示了使用 goto 跳出嵌套循环/// 输入 44 示例输出 /// Enter the number to search for: 44/// The number 44 is found./// End of search./// </summary>static void Main(){int x = 200, y = 4; int count = 0; string[,] array = new string[x, y]; // Initialize the array:     for (int i = 0; i < x; i++)  for (int j = 0; j < y; j++)    array[i, j] = (++count).ToString();   // Read input:         Console.Write("Enter the number to search for: ");    // Input a string:        string myNumber = Console.ReadLine();      // Search:    for (int i = 0; i < x; i++)    {            for (int j = 0; j < y; j++){            if (array[i, j].Equals(myNumber))  {                 goto Found;       }            }        }       Console.WriteLine("The number {0} was not found.", myNumber);    goto Finish;   Found:     Console.WriteLine("The number {0} is found.", myNumber); Finish:        Console.WriteLine("End of search.");  }

        /// <summary>/// thow 示例/// </summary>static void Main(){string s = null;if (s == null){throw new ArgumentNullException();}Console.Write("The string s is null");// not executed   }