Changing Project Build Configuration to Debug mode

I am using VS 2008. I am getting a PopUp everytime i run my application.

Following is the PopUp:

The following module was built with optimizations enabled or without debug information :

C:\Windows\Microsoft.Net\Framework\v2.0.50727\Temporary ASP.NET Files\root\7c06d97f\c871fca3\assembly\dl3\1ed1f335\00d7b454_9450ca01\BArcodingImaging.DLL

To debug this module, change its project build configuration to debug mode. To suppress this message, disable the "Warn inf no user code on launch" debugger option.

I have tried all the links available on the Google to get rid of this error but nothing works. Actually most of the links are for VS 2005. But i am using VS 2008.

I used following reference: http://social.msdn.microsoft.com/Forums/en-US/tfsbuild/thread/1946cf16-ae70-4394-9cd9-9d35f3f012ed/ And one on Code Guru.