Writing
HttpWebRequest - Asynchronous Programming Model/Task.Factory.FromAsyc
HttpWebRequest callbacks and Task.Factory.FromAsync support asynchronous GET and POST calls, with five approaches compared for collecting concurrent responses.
Topic
Asynchronous Programming Model
The .NET Asynchronous Programming Model exposes Begin and End method pairs, IAsyncResult, callbacks, and state for asynchronous operations.
2 pages
Writing
IAsyncResult–Making Existing methods Asnchronous
Expose an existing synchronous method through Begin and End operations using delegates and IAsyncResult, carrying callback state while reusing the original computation.