Ribbon tab exists even after uninstalling PowerPoint Add-in

Question

I have created an application level Add-in for PowerPoint 2010/2013 using C# VSTO. The add-in is installed from msi installer file.
The problem is that after I uninstall the add-in from the control panel and open a new PowerPoint presentation, the ribbon tab is still visible with all the functionalities correctly working.
To remove the tab I have to do either of the following two things:
Remove the add-in from the COM Add-ins list from the PowerPoint Developer tab.
End the running instance of PowerPoint from Task Manager.
I have called the dispose methods(in ThisAddIn_Shutdown method) for all the initializations I have done in ThisAddIn_StartUp method but this is not helping.
private void ThisAddIn_Shutdown(object sender, System.EventArgs e)
this.Application.WindowSelectionChange -= Application_WindowSelectionChange;
this.Application.SlideSelectionChanged -= Application_SlideSelectionChanged;
this.Application.SlideShowBegin -= Application_SlideShowBegin;
this.Application.SlideShowEnd -= Application_SlideShowEnd;
}I figured out that this is happening because of the task-pane objects created inside ThisAddIn_StartUp, which I have disposed in ThisAddIn_Shutdown, Application_PresentationClose and Application_PresentationCloseFinal. But still I have no luck.Please let me know what else is to be done!Thanks

Answer 1

Hi,
This is the forum to discuss questions and feedback for Microsoft Office, the issue is more related to develop the add-in, you'd better post your question to the MSDN forum for VSTO
http://social.msdn.microsoft.com/Forums/en-US/home?forum=vsto&filter=alltypes&sort=lastpostdesc
The reason why we recommend posting appropriately is you will get the most qualified pool of respondents, and other partners who read the forums regularly can either share their knowledge or learn from your interaction with us. Thank you for your understanding.
George Zhao
TechNet Community Support