goto语句会引起程序混乱?使用goto解决实际问题

总看到书上说goto语句会引起程序的混乱,我想引起混乱是针对于编程新手不懂得如何使用而言，

既然设计出了goto那自然有它存在的道理,我们通过如下的例子来说明goto的使用

 

例子采自我的项目OPS.CSite中的读取配置的代码

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namespace OPS.CSite {     using System;     using System.Resources;     using System.IO;     using System.Web;     using System.Xml;       internal class Config     {         private static Site site;           private static readonly string _configFile;           static Config()         {             _configFile = AppDomain.CurrentDomain.BaseDirectory + "config.xml";             OutputConfigFile();         }         private static void OutputConfigFile()         {             //将配置文件保存到应用程序根目录下             FileInfo file = new FileInfo(_configFile);             if (!file.Exists)             {                 string config = new ResourceManager(typeof(Properties.Resources)).GetObject("config").ToString();                 using (FileStream fs = new FileStream(file.FullName, FileMode.Create, FileAccess.ReadWrite))                 {                     StreamWriter sr = new StreamWriter(fs);                     sr.Write(config);                     sr.Dispose();                     fs.Dispose();                 }             }         }         public static Site GetSiteObject()         {             object obj = HttpRuntime.Cache["cfg_site"];             if (obj == null || site == null)             {                Load:             try                 {                     site = new Site();                     XmlDocument xd = new XmlDocument();                     xd.Load(_configFile);                     site.Name = xd.SelectSingleNode("/config/site/name").Attributes["value"].Value;                     site.ShortName = xd.SelectSingleNode("/config/site/shortName").Attributes["value"].Value;                     site.Title = xd.SelectSingleNode("/config/site/title").Attributes["value"].Value;                     site.Slogan = xd.SelectSingleNode("/config/site/slogan").InnerText;                     site.Notice = xd.SelectSingleNode("/config/site/notice").InnerText;                     HttpRuntime.Cache.Insert("cfg_site", "1", new System.Web.Caching.CacheDependency(_configFile));                 }                 catch                 {                     OutputConfigFile(); goto Load;                }             }             return site;         }

 认真的朋友已经看出来了,当我们在读取XML配置过程中因为某些原因导致异常,如文件不存在了,

 这时候我们仅仅输出一个配置文件是不够的，因为GetSiteObject()还需要返回一个Site对象

 goto在这里的用法为:如果文件不存在则输出一个文件再去读取配置

这样就保证了程序的正常运行,有书上说:

Label:这种语法不要用,试想一下，在我们讨论的环境中还可以使用while循环来达到目的,但很明显的

goto更简洁，更合适!