描述如下：
A、联网情况下
在VS中按F5运行Web调试，出错提示为：“

Internet Explorer 无法显示该页面

”此时IE8的地址栏中为“http://localhost:6999/Web/”
将localhost改为“127.0.0.1”竟然可以！⊙﹏⊙b汗！
B、断开网线，直接调试运行。无任何问题，(#‵′)靠！；此时IE8标题栏还是”http://localhost:6999/Web/“
在没升级为IE8之前，我是IE7也出现过类似的问题，但是没注意，不知道这个Vista的问题呢，还是VS2008的问题，希望知道的同志能分析下，或者给个修复的办法！

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问题解决了，竟然真的是host的问题
解决问题的思路：
不管如何现在host的可疑最大
在cmd中输入 C:\WINDOWS\system32\drivers\etc\hosts
发现host文件如下显示
# Copyright (c) 1993-2006 Microsoft Corp.
#
# This is a sample HOSTS file used by Microsoft TCP/IP for Windows.
#
# This file contains the mappings of IP addresses to host names. Each
# entry should be kept on an individual line. The IP address should
# be placed in the first column followed by the corresponding host name.
# The IP address and the host name should be separated by at least one
# space.
#
# Additionally, comments (such as these) may be inserted on individual
# lines or following the machine name denoted by a '#' symbol.
#
# For example:
#
#      102.54.94.97     rhino.acme.com          # source server
#       38.25.63.10     x.acme.com              # x client host
::1             localhost
⊙﹏⊙b汗啊！
没有 127.0.0.1 啊。~
于是在做了如下修改
127.0.0.1       localhost
::1             localhost
再次运行VS调试，问题解决！

思考，在断开网络的情况下为什么能正确映射呢？