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WebException Constructor

Initializes a new instance of the WebException class.

Namespace:  System.Net
Assemblies:   System.Net.Requests (in System.Net.Requests.dll)
  System (in System.dll)

'Declaration
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.

        Try 
            ' A 'Socket' object has been created. 
            Dim httpSocket As New Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp)

            ' The IPaddress of the unknown uri is resolved using the 'Dns.Resolve' method.  
	         ' which leads to the 'SocketException' exception.  

            Dim hostEntry As IPHostEntry = Dns.Resolve("http://www.contoso.com")

            Dim serverAddress As IPAddress = hostEntry.AddressList(0)
            Dim endPoint As New IPEndPoint(serverAddress, 80)
            httpSocket.Connect(endPoint)
            Console.WriteLine("Connection created successfully")
            httpSocket.Close()
        Catch e As SocketException
            Dim exp As [String] = e.Message
            ' Throw the WebException with no parameters. 
            Throw New WebException()
        End Try

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Portable Class Library

Supported in: Portable Class Library

.NET for Windows Store apps

Supported in: Windows 8

Supported in: Windows Phone 8.1

Supported in: Windows Phone Silverlight 8.1

Supported in: Windows Phone Silverlight 8

Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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