Don't worry. Not everyone knows it...

Today while working on one of the application that was for ClickOnce deployment I faced a small issue which took almost my half an hour. My task was to associate a default icon to my application. So, in order to do this, I went to my project properties and simply set the icon as shown below: As you can see in above screenshot, it is showing an error icon which states: 'Icon file is not set to be published with the application, or is not part of the required download group' Then I build my application and land up with below error message which was more clear: After hitting my head for many minutes, I thought, let's check out what is this 'download group'. On surfing net, I got the clue that download group is nothing but a collection of files which are going to be part of our publish activity. So, I quickly opened Application Files dialog using Project properties >> Publish. The Application Files dialog looks like: ...