MailFolderMessageSummaryFetched Event

public event EventHandler<MessageSummaryFetchedEventArgs> MessageSummaryFetched

Value

Implements

Emitted when a message summary is fetched from the folder.

When multiple message summaries are being fetched from a remote folder, it is possible that the connection will drop or some other exception will occur, causing the Fetch method to fail and lose all of the data that has been downloaded up to that point, requiring the client to request the same set of message summaries all over again after it reconnects. This is obviously inefficient. To alleviate this potential problem, this event will be emitted as soon as the IMailFolder successfully parses each untagged FETCH response from the server, allowing the client to commit this data immediately to its local cache.

Note
Depending on the IMAP server, it is possible that the MessageSummaryFetched event will be emitted for the same message multiple times if the IMAP server happens to split the requested fields into multiple untagged FETCH responses. Use the Fields property to determine which fIMessageSummary properties have been populated.

Reference