今天把系统升级至1.5，转载一篇文章，如何升级：

By Miha Markič

I have just upgraded blogengine.net, an excellent blog engine which hosts this blog, from 1.4.5 to 1.5. The process was more or less smooth as I’ll describe in next points:

1. Download Blogengine.net Web from download page.
2. Read upgrade tutorial.
3. Make a backup of current installation and database if you are using it.
4. Delete all files and folders except for App_Data.
5. Copy new files.
6. Copy extensions, widgets and other custom data from backup you made in #3.
7. Upgrade database structure with script found in Setup/SQLServer folder (or any other if you are using other database).
8. Open web.config and replace the connectionString (I am using SQL Server as a storage).
9. Replace all occurences of defaultProvider attribute to “DbBlogProvider” (blogProvider, membership, roleManager).
10. Make sure App_Data is writable for Blogengine.net.

I think that’s pretty much it for my upgrade process.