c# project related problem

i had created the inventory control management system in C# i tool the database as sql server
2008. Now i m getting the problem that i wanted to deploy this inventory control software in some one else pc it is showing me error of something like computername/SQLEXPRESS were as my sql instance name is DELL-PC/SQLEXPRESS how would i code that automatically get the name or instance of another database plz do reply on this .............

thanks