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Uri.MakeRelativeUri Method

Note: This method is new in the .NET Framework version 2.0.

Determines the difference between two Uri instances.

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

public Uri MakeRelativeUri (
	Uri uri
public Uri MakeRelativeUri (
	Uri uri
public function MakeRelativeUri (
	uri : Uri
) : Uri



The URI to compare to the current URI.

Return Value

If the hostname and scheme of this URI instance and toUri are the same, then this method returns a relative URI that, when appended to the current URI instance, yields toUri. If the hostname or scheme is different, then this method returns toUri.

Exception typeCondition


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

The following table shows the URI instance, toUri, and the results of calling MakeRelativeUri.

Current URI instance


Return value




User information, if present in the URI, is ignored.

The following example creates 2 Uri instances. The difference in the path information is written to the console.

// Create a base Uri.
Uri address1 = new Uri("");

// Create a new Uri from a string.
Uri address2 = new Uri(""); 
// Determine the relative Uri.  
Console.WriteLine("The difference is {0}", address1.MakeRelativeUri(address2));

Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

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

.NET Framework

Supported in: 2.0

.NET Compact Framework

Supported in: 2.0