I am working on an ArcObjects addin for Desktop 10.1. I am using the SelectionExtension as a template for my addin. I was unable to listen for events through a dockable window, so at others suggestions I am trying to use an extension. I tried an editor extension, but for some reason the OnStartup() method never fired. Now just to narrow down what is going on, I have a regular extension that I can enable/disable in the Extension Manager window. However, it appears that there is something else going on. The extension is visible, but I am unable to enable it in the Extension Manager window. I know these are two seemingly unrelated issues, but it seems that the OnStartup() method of the new regular extension is not firing as well. I am at a loss as to what I have done wrong. Is there any reason that the OnStartup methods aren't firing, and would that relate to the enable/disable state in the Extension Manager window?
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