private void ThisAddIn_Shutdown(object sender, System.EventArgs e)
{
Application.WorkbookActivate -= Application_WorkbookActivate;
Application.WorkbookBeforeClose -= Application_WorkbookBeforeClose;
Application.WindowDeactivate -= Application_WindowDeactivate;
foreach (var x in Panes.Values)
{
CleanUpPaneAndControl(x);
}
Panes.Clear();
}
