Here is a simple but usefull tip for outlook add-in developers. You can create new folders with the help of the following code :
//using Outlook = Microsoft.Office.Interop.Outlook; //ThisApplication outlook Outlook.MAPIFolder rootFolder = Utility.Folder.GetRootFolder(outlook.Session); Outlook.MAPIFolder tcRootFolder = Utility.Folder.CreateFolder(rootFolder, "My Folder");