I wrote following code to delete all the user properties of all the mails in folder -inbox. When I was stepping through the code, there were no any exceptions. Delete() and Save() methods were executed properly.
Then after, when I was checking for user properties using the outlook design mode still I was able to see the user property, it had not deleted. (see the picture)
Can you please explain what's going on here? Any mistakes in the code?
//Test
InboxFolder = outlookNs.GetDefaultFolder(Microsoft.Office.Interop.Outlook.OlDefaultFolders.olFolderInbox);
items = InboxFolder.Items;
foreach (object mailitem in items)
{
olMail = mailitem as Outlook.MailItem;
if (olMail != null)
{
Outlook.UserProperty upK = olMail.UserProperties["Processed"];
if (upK != null)
upK.Delete();
olMail.Save();
}
}
//Test
