Right Click on Soution of your project.
Click Add New Project.
Select Other Project Type ->Setup Project.
write in Name that u want to give to setup project.
click OK.
Select Setup Project.See the option above the Solution.
Go To Custom Action. you will see four folder.
Right Click on Install folder and Select Add Custom Action.
Double click on Application Folder.
Click on Add Output.Select Primary Output. And Press OK.
Now build the projects again.
The setup will be in Debug folder of your setup project.
refer these sites it will be help full
http://www.codersource.net/csharp_installer_projects.html
http://www.codeguru.com/csharp/.net/net_vs_addins/visualstudioadd-ins/article.php/c7245
http://www.15seconds.com/issue/030806.htm