异常问题

Question

using System;
using System.Collections.Generic;
using System.Text;
using System.Diagnostics;namespace ConsoleApplication2
{
     
    class Program
    {
        static string[] eTypes ={ "none", "simple", "index", "nested idex" };    
        static void Main(string[] args)
        {
            foreach (string eType in eTypes)
            {
                try
                {
                    Console.WriteLine("Main() try block reached.");//line 18
                    Console.WriteLine("ThrowException(\"{0}\")called.", eType);//line 19
                    ThrowException(eType);
                    Console.WriteLine("Main()try block continus.");//line 21
                }
                catch (System.IndexOutOfRangeException e)//line 23
                {
                    Console.WriteLine("Main()System.IndexOutOfRangeException catch" + "bock reached.Message:\n\"{0}\"", e.Message);
                }
                catch//line 29
                {                    Console.WriteLine("Main()general catch block reached.");                }
                finally 
                {
                    Console.WriteLine("Main()finally block reached."); 
                }
                Console.WriteLine();
            }
        }
        static void ThrowException(string execptionType)
        {                                                   //line 43
            Console.WriteLine("ThrowException(\"{0}\"", execptionType);
            switch (execptionType)
            {
                case "none":
                    Console.WriteLine("Not throwing an exception.");
                    break;                                      //line 48
                case "simple":
                    Console.WriteLine("Throwing System.Exception.");
                    throw (new System.Exception());                //line 51
                    break;
                case "index":
                    Console.WriteLine("Throwing System.IndexOutRangeException.");
                    eTypes[4] = "error";                               //line 55
                    break;
                case "nested index":                    try                                             //line 58
                    {
                        Console.WriteLine("ThrowException(\"nested index\")" + "try block reached.");
                        Console.WriteLine("ThrowException(\"index\")called.");
                        ThrowException("index");                           //line 63
                    }
                    catch                                                    //line 65
                    {
                        Console.WriteLine("ThrowException(\"nested index\")general" + "catch block reached.");
                        throw;
                    }
                    finally
                    {
                        Console.WriteLine("ThrowException(\"nested index\")finally" + "block reached.");                    }
                    break;            }
            
            }
         
        
            
        
        
        
        }
     }
-----------------------------------------------------------------------
ThrowException("index");    //line 63  
这句是什么意思？？
执行到这句以后然后执行哪里？

Answer 1

这句话就是抛出异常,以后就直接系统报错了.报错的信息就是index