This documentation is archived and is not being maintained.

Uri.MakeRelativeUri Method

Determines the difference between two Uri instances.

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

public Uri MakeRelativeUri(
	Uri uri


Type: System.Uri

The URI to compare to the current URI.

Return Value

Type: System.Uri
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 a Uri that represents the toUri parameter.


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

// Create a new Uri from a string.
Uri* address2 = new Uri(S""); 

// Determine the relative Uri.  
Console::WriteLine(S"The difference is {0}", address1->MakeRelative(address2));

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

.NET Compact Framework

Supported in: 3.5, 2.0

XNA Framework

Supported in: 3.0, 2.0, 1.0