ASP.NET Core MVC中的两种404错误 .font

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p{margin-top:20px!important;margin-bottom:20px!important;margin-left:0!important;margin-right:0!important}.font_xl.pgc article p{margin-top:23px!important;margin-bottom:23px!important;margin-left:0!important;margin-right:0!important}.pgc article p:first-child{margin-top:0!important}.pgc article blockquote>p:first-child{margin-top:0!important}.pgc article blockquote>p:last-child{margin-bottom:0!important}.pgc article blockquote li:first-child p{margin-top:0!important}.pgc article blockquote li:last-child p{margin-bottom:0!important}我们在使用某些系统的时候，如果访问了一个不存在的地址怎么办，比如http://52abp. com/airport/fly；或者访问的地址路由和操作方法虽然存在，但是地址参数id不存在，比如这个信息是存在的，但是更改访问时，则提示博客内容不存在。
在我们的系统中要如何处理呢？