ArcGIS Add in Config.esriaddinx

In ArcGIS 10, the add-in package does not automatically build a workable xml config file for you. You have to add the follow piece of code in yourself between the Tags.

 <ArcMap>

      <Commands>
        <Button class="[exact name of button file]" 
                caption="[shown in addin manager]" 
                tip=""  
                message="" 
                image="Images\Button12.png">

          <Help heading="">Help</Help>
        </Button>

      </Commands>

 </ArcMap>

Use ArcScene tags, for example, if it is an add in for ArcScene.
For toolbox, declare all button tags first. And then Add tag.
Do not use “&” in your xml file.