Clickonce for an Addin

ClickOnce is more suitable for running per user .Net 2.0 applications. You would be better off using MSI or some other installer techonogy for re-distribution. The disadvantages of using ClickOnce in this particular case are
1. You need to install/run an applictaion which carries the plugin along with it.
2. The app needs to monitor updates. This can be done either using ClickOnce APIs in the application or the user needs to peiodically restart the app to detect and install updates.
3. Updates are downloaded to obfuscated directories under the ClickOnce store; not easily discoverable. Every time a new update is downloaded users will have to navigate to this dir to get the plugin.

Thanks,
Sameer