In this pattern, synchronous operations require Begin and End methods (for example, BeginWrite and EndWrite to implement an asynchronous write operation). For more information, see Event-based Asynchronous Pattern (EAP).Īsynchronous Programming Model (APM) pattern (also called the IAsyncResult pattern), which is the legacy model that uses the IAsyncResult interface to provide asynchronous behavior. It's no longer recommended for new development. It requires a method that has the Async suffix and one or more events, event handler delegate types, and EventArg-derived types. For more information, see Task-based Asynchronous Pattern (TAP).Įvent-based Asynchronous Pattern (EAP), which is the event-based legacy model for providing asynchronous behavior. The async and await keywords in C# and the Async and Await operators in Visual Basic add language support for TAP. It's the recommended approach to asynchronous programming in. Task-based Asynchronous Pattern (TAP), which uses a single method to represent the initiation and completion of an asynchronous operation. NET provides three patterns for performing asynchronous operations:
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