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IPAddress.Loopback Field

Provides the IP loopback address. This field is read-only.

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

'Declaration
Public Shared ReadOnly Loopback As IPAddress

The Loopback field is equivalent to 127.0.0.1 in dotted-quad notation.

The following example prints the Loopback address to the console.

Public Sub PrintLoopbackAddress()
    ' Gets the IP loopback address and converts it to a string. 
    Dim IpAddressString As [String] = IPAddress.Loopback.ToString()
    Console.WriteLine(("Loopback IP address : " + IpAddressString))
End Sub 'PrintLoopbackAddress

.NET Framework

Supported in: 4.5.2, 4.5.1, 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

.NET for Windows Phone apps

Supported in: Windows Phone 8.1, Windows Phone 8, Silverlight 8.1

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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