Uri.IsLoopback Property

Gets whether the specified Uri references the local host.

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

public bool IsLoopback { get; }

Property Value

Type: System.Boolean
A Boolean value that is true if this Uri references the local host; otherwise, false.

ExceptionCondition
InvalidOperationException

This instance represents a relative URI, and this property is valid only for absolute URIs.

IsLoopback returns true if the URI specified when this instance was created was 127.0.0.1, loopback, or localhost, or if the URI did not specify host information (for example, file:///c:Dir/file.txt). All other URIs return false.

The following example creates a Uri instance and determines whether it references a local host.

Uri uriAddress2 =  new Uri("file://server/filename.ext");
Console.WriteLine(uriAddress2.LocalPath);
Console.WriteLine("Uri {0} a UNC path", uriAddress2.IsUnc ? "is" : "is not");
Console.WriteLine("Uri {0} a local host", uriAddress2.IsLoopback ? "is" : "is not");
Console.WriteLine("Uri {0} a file", uriAddress2.IsFile ? "is" : "is not");
Uri* uriAddress2 =  new Uri(S"file://server/filename.ext");
Console::WriteLine(uriAddress2->LocalPath);
Console::WriteLine(S"Uri {0} a UNC path", uriAddress2->IsUnc ? S"is" : S"is not");
Console::WriteLine(S"Uri {0} a local host", uriAddress2->IsLoopback ? S"is" : S"is not");
Console::WriteLine(S"Uri {0} a file", uriAddress2->IsFile ? S"is" : S"is not");

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC, Xbox 360, Zune

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

.NET Framework

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

.NET Compact Framework

Supported in: 3.5, 2.0, 1.0

XNA Framework

Supported in: 3.0, 2.0, 1.0
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