异常--throw

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

namespace @throw

{

    class test

    {

        public int Myint(string a, string b)

        {

            int intn1;

            int intn2;

            int num;

            intn1 = int.Parse(a);

            intn2 = int.Parse(b);

            if(intn2 == 0)

            {

                throw new DivideByZeroException();

                return 0;

            }

            else

            {

                num = intn1 / intn2;

                return num;

            }

        }

    }

    class Program

    {

        static void Main(string[] args)

        {

            while(true)

            {

                Console.WriteLine("请输入分子：");

                string str1 = Console.ReadLine();

                Console.WriteLine("请输入分母：");

                string str2 = Console.ReadLine();

                test tt = new test();

                Console.WriteLine(tt.Myint(str1,str2));

            }

        }

    }

}

　　throw在特定情况下主动抛出异常

(1)ArithmeticException

(2)ArrayTypeMismatchException

(3)DivideByZeroException

(4)IndexOutOfRangeException

(5)InvalidCastException

(6)NullReferenceException

(7)OutOfMemoryException

(8)OverflowException

(9)StackOverflowException

(10)TypeInitializationException