public static IEFolders GetFolders(IEFolder folder, FolderDescriptor folderDescriptor) { try { if (folderDescriptor == null) { folderDescriptor = FolderDescriptor.Get(folder); } return(folder.GetFolders()); } catch (COMException exception) { _tracer.TraceException(exception); OutlookSession.ProblemWithOpeningFolder(folderDescriptor.FolderIDs.EntryId); } return(null); }