CREATE DATABASE permission denied in database ‘master’.
An attempt to attach an auto-named database for file
C:\Documents and Settings\..\App_Data\HelloWorld.mdf Failed.
A database with the same name exists,or specified file cannot be
opened,or it is located on UNC share.
我找到了这些链接：
> http://blog.benhall.me.uk/2008/03/sql-server-and-vista-create-database.html
> http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=702726&SiteID=1
