When you try to add a column in the middle of table or adding a primary key In SQL Server 2008 Management Studio you see a "hard" warning like this :
Saving changes is not permitted. The changes you have made require the following tables to be dropped and re-created. You have either made changes to a table that can't be re-created or enabled the option Prevent saving changes that require the table to be re-created.
- Open menu Tools > Options
- In the Options's dialog, expand "Designers" node and choose "Table and Database Designers" node
- Uncheck "Prevent saving changes that require table re-creation" option
- Click "OK"