|  | Mail | 
 Syntax
Syntaxpublic abstract Task<HeaderList> GetHeadersAsync( int index, BodyPart part, CancellationToken cancellationToken = default, ITransferProgress progress = null )
 Exceptions
Exceptions| Exception | Condition | 
|---|---|
| ArgumentOutOfRangeException | index is out of range. | 
| ArgumentNullException | part is . | 
| ObjectDisposedException | The IMailStore has been disposed. | 
| ServiceNotConnectedException | The IMailStore is not connected. | 
| ServiceNotAuthenticatedException | The IMailStore is not authenticated. | 
| FolderNotOpenException | The folder is not currently open. | 
| MessageNotFoundException | The IMailStore did not return the requested body part headers. | 
| OperationCanceledException | The operation was canceled via the cancellation token. | 
| IOException | An I/O error occurred. | 
| ProtocolException | The server's response contained unexpected tokens. | 
| CommandException | The command failed. | 
 Remarks
Remarks See Also
See Also