The file name of the attachment.
The file name of the attachment. If IncomingDirectory has been specified, the attachment will be written to the specified directory and the name will be provided by this property. Otherwise, this will contain the name of the attachment as described in the AttachmentHeaders.
The AttachmentIndex parameter specifies the index of the item in the array. The size of the array is controlled by the AttachmentCount property.
This property is not available at design time.