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IPAddress.IsLoopback Method

Indicates whether the specified IP address is the loopback address.

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

static member IsLoopback : 
        address:IPAddress -> bool 

Parameters

address
Type: System.Net.IPAddress
An IP address.

Return Value

Type: System.Boolean
true if address is the loopback address; otherwise, false.

The IsLoopback method compares address to Loopback and returns true if the two IP addresses are the same.

In the case of IPv4, that the IsLoopback method returns true for any IP address of the form 127.X.Y.Z (where X, Y, and Z are in the range 0-255), not just Loopback (127.0.0.1).

The following code example uses the IsLoopback method to determine whether the specified address is a loopback address.

No code example is currently available or this language may not be supported.

.NET Framework

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

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

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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