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We are getting following exception after migrating Outlook 2007 VSTO add-in project to Visual Studio 2010 and targeting it to .Net 4.0 Framework for Outlook 2010: Inheritance security rules violated by type: 'VS2008_FR_OLAddIn.ThisAddIn'. Derived types must either match the security accessibility of...

“What is the best way to deploy VSTO add-ins for Outlook?” This is one of the most common question asked by our customers who are developing add-ins using Visual Studio Tools for Office(VSTO) for Outlook and other Office Applications.  Simple answer is that it’s all depend on you requirements and...

Here is a news for you… MSDN® is sponsoring a coding contest for Office 2007, named OfficePalooza ! This international contest will run for two weeks beginning April 20, 2009, and features ten fun Visual Basic of Applications™ (VBA) coding challenges in the form of puzzles and games. Each entrant will...

How to capture whether user has checked to send Outlook Mail with digital signature or encrypted from VSTO Add-in in C# ? We can use the following code snippet with VSTO SE Outlook Skeleton project to build sample add-in: IMPORTANT NOTE: This add-in will only work if we are NOT using Word as default...

If you are getting "There was an error during installation. Value does not fall within the expected range." error along with following exception: ************** Exception Text ************** System.ArgumentException: Value does not fall within the expected range. at Microsoft.VisualStudio.Tools.Applications...