SQL Server, How to set auto increment after creating a table without data loss?

Question

I have a table table1 in SQL server 2008 and it has records in it.

I want the primary key table1_Sno column to be an auto-incrementing col

Answer 1

If you want to do this via the designer you can do it by following the instructions here "Save changes is not permitted" when changing an existing column to be nullable