IRibbonExtensibility needs to be ComVisible

When developing an Outlook add-in using VSTO 4, if you are implementing the IRibbonExtensibility interface (for customizing a Ribbon, for example) you might encounter cases where your Ribbon or menu items don't appear in Outlook's UI.
In those cases, you should check the following things first:

1. Your XML is valid - invalid Ribbon XML, such as placing the node inside the node are common mistakes, which will prevent your controls from appearing
2. Your class should be marks as ComVisible:
   [ComVisible(true)]
   public class Ribbon : IRibbonExtensibility
   {
      ...
   }

TFS: Undo another user's check-out files

In order to undo files that are checked-out by another user, ou can use the TF.EXE command-line tool:

 

tf undo [/workspace:workspacename[;workspaceowner]] [/recursive] itemspec [/noprompt] [/login:username,[password]] [/collection:TeamProjectCollectionUrl]

For example:
tf undo /workspace:MyWorkspace;DOMAIN\Itay /recursive *.* /collection:TeamProject

 

You can find the TF.EXE tool in the following locations:

• For TFS 2008: C:\Program Files (x86)\Microsoft Visual Studio 9.0\Common7\IDE\TF.exe
• For TFS 2010: C:\Program Files (x86)\Microsoft Visual Studio 10.0\Common7\IDE\TF.exe