Iâm working as a freelancer and creating different types of projects on C# language. From last few days, Iâm handling a project in which I have to open .OST file in C#. For doing such things, I have written the following code:
private void CreateInboxSubFolder(Outlook.Application OutlookApp)
Outlook.NameSpace nameSpace = OutlookApp.GetNamespace("MAPI");
Outlook.MAPIFolder folderInbox = nameSpace.GetDefaultFolder(
Outlook.Folders inboxFolders = folderInbox.Folders;
Outlook.MAPIFolder subfolderInbox = null;
subfolderInbox = inboxFolders.Add("InboxSubfolder",
catch (COMException exception)
if (exception.ErrorCode == -2147352567)
// Cannot create the folder.
if (subfolderInbox != null) Marshal.ReleaseComObject(subfolderInbox);
if (inboxFolders != null) Marshal.ReleaseComObject(inboxFolders);
if (folderInbox != null) Marshal.ReleaseComObject(folderInbox);
if (nameSpace != null) Marshal.ReleaseComObject(nameSpace);
After executing these code on C# programming, I get an error message ErrorCode=-2147352567. To sort out this error I have searched over p2p Wrox forum and found no thread.
So, I have searched over the Internet and found few useful resources. But Iâm confused which will fix my programming error.