i am new to program,and our teacher asked us to write a small program witch using sqlserver; so i use visual studio 2010 c# to write it,but i meet a problem: i don't know how to make a setup file.because i put the SqlConnectionString in the code file directly;so,even i have publish the program ,the sqlconnectionstring didn't change,it didn't works~ this is the first time to write this kind program,and i dont know how to make it work right on others computer; can you tell me the way to solve it? do i need change the way of coding?how? thanks~