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Uri.IsUnc Property

Gets whether the specified Uri is a universal naming convention (UNC) path.

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

public bool IsUnc { get; }

Property Value

Type: System.Boolean
A Boolean value that is true if the Uri is a UNC path; otherwise, false.

ExceptionCondition
InvalidOperationException

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

The IsUnc property is true if the specified Uri instance is a UNC path (such as \\server\folder or file://server/folder). This property always returns true if the URI has the file:// scheme and specifies a host component.

The following example creates a Uri instance and determines whether it is a UNC path.

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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