I have one matrimonial website with programmed by asp. Now i change to asp.net. How to keep and move my old registered profiles on database to new asp.net coding? Thanks in advance.
You shouldn't need to make any changes to the database at all. With your new site being coded in .net the database will still be available to be queried, it is just the code that is accessing it that will be different, not the database.
Well it depends on the new application architecture. For example, if you want to use the .NET Framework built-in membership you will have to modify the database .. otherwise you can keep the existing DB and change only the business and presentation layers.