WebException Constructor

WebException Constructor

Initializes a new instance of the WebException class.

Namespace:  System.Net
Assembly:  System.Net (in System.Net.dll)

Public Sub New

The default constructor initializes a new instance of the WebException class. The Message property is initialized to a system-supplied message that describes the error. This message takes into account the current system culture. The InnerException and Response properties are initialized to Nothing. The Status property is initialized to RequestCanceled.

The following example throws a default WebException.

  public class Example
    static ManualResetEvent clientDone = new ManualResetEvent(false);

    public static void Demo(System.Windows.Controls.TextBlock outputBlock)
        SocketAsyncEventArgs socketEventArg = new SocketAsyncEventArgs();
		    DnsEndPoint hostEntry = new DnsEndPoint("http://www.contoso.com", 80);

        // Create a socket and connect to the server
        Socket sock = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);

        socketEventArg.Completed += new EventHandler<SocketAsyncEventArgs>(SocketEventArg_Completed);

        socketEventArg.RemoteEndPoint = hostEntry;
        socketEventArg.UserToken = sock;

    static void SocketEventArg_Completed(object sender, SocketAsyncEventArgs e)
         if (e.LastOperation == SocketAsyncOperation.Connect) {
           if (e.SocketError == SocketError.Success)
                // Successfully connected to the server

	   	          // Throw the WebException with no parameters.
		            throw new WebException();
		     // socket operation not a connect!  
            throw new Exception("Invalid operation completed");


Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

XNA Framework

Supported in: Windows Phone OS 7.0

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

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