NGWS SDK Documentation  

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IAsyncResult Properties

The properties of the IAsyncResult interface are listed below. For a complete list of IAsyncResult interface members, see the IAsyncResult Members topic.

AsyncObject  
AsyncState  
AsyncWaitHandle The AsyncWaitHandle property returns the WaitHandle that can use to perform a WaitHandle.WaitOne or WaitAny or WaitAll. The object which implements IAsyncResult need not derive from the System.WaitHandle classes directly. The WaitHandle wraps its underlying synchronization primitive and should be signaled after the call is completed. This enables the client to wait for the call to complete instead polling. The Runtime supplies a number of waitable objects that mirror Win32 synchronization primitives e.g. ManualResetEvent, AutoResetEvent and Mutex.

WaitHandle supplies methods that support waiting for such synchronization objects to become signaled with "any" or "all" semantics i.e. WaitHandle.WaitOne, WaitAny and WaitAll. Such methods are context aware to avoid deadlocks. The AsyncWaitHandle can be allocated eagerly or on demand. It is the choice of the IAsyncResult implementer.

Implementors of classes that return IAsyncResult should note the following: The AsyncWaitHandle can be lazily allocated. However once allocated it should be kept alive until the user calls EndXXXX. At that time the object behind AsyncWaitHandle can be recycled.

CompletedSynchronously  
IsCompleted  

See Also

IAsyncResult Interface | System Namespace