Dns.BeginGetHostByName Method (String, AsyncCallback, Object)
Begins an asynchronous request for IPHostEntry information about the specified DNS host name.
Assembly: System (in System.dll)
[ObsoleteAttribute("BeginGetHostByName is obsoleted for this type, please use BeginGetHostEntry instead. http://go.microsoft.com/fwlink/?linkid=14202")] [HostProtectionAttribute(SecurityAction.LinkDemand, ExternalThreading = true)] public static IAsyncResult BeginGetHostByName( string hostName, AsyncCallback requestCallback, object stateObject )
The DNS name of the host.
An AsyncCallback delegate that references the method to invoke when the operation is complete.
A user-defined object that contains information about the operation. This object is passed to the requestCallback delegate when the operation is complete.
The asynchronous EndGetHostByName method. Typically, the method is invoked by the requestCallback delegate.operation must be completed by calling the
This method does not block until the operation is complete. To block until the operation is complete, use the GetHostByName method.
For detailed information about using the asynchronous programming model, see Calling Synchronous Methods Asynchronously.
This member emits trace information when you enable network tracing in your application. For more information, see Network Tracing in the .NET Framework.
for accessing DNS information. Associated enumeration: PermissionState.Unrestricted
Available since 1.1