Key for optional delivery-time property, a WebLogic extension of the JMS specification. To set message delivery times in the JMS .NET API, add a property of type long with this name to the message, where the value is the number of milliseconds in the future in which the message will be delivered; to retrieve the delivery-time retrieve this property as a long property (as with all long properties, retrieval throws an exception if the property does not exist).
Constants.MessagePropertyNames Class | WebLogic.Messaging Namespace