Bug 47444 - System.Uri class treat relative uri as absolute path
Summary: System.Uri class treat relative uri as absolute path
Alias: None
Product: Class Libraries
Classification: Mono
Component: System ()
Version: unspecified
Hardware: PC Mac OS
: --- normal
Target Milestone: Untriaged
Assignee: Marek Safar
Depends on:
Reported: 2016-11-18 23:59 UTC by chenglon
Modified: 2016-11-20 09:32 UTC (History)
2 users (show)

Is this bug a regression?: ---
Last known good build:

Sample code. (11.64 KB, application/zip)
2016-11-18 23:59 UTC, chenglon

Notice (2018-05-24): bugzilla.xamarin.com is now in read-only mode.

Please join us on Visual Studio Developer Community and in the Xamarin and Mono organizations on GitHub to continue tracking issues. Bugzilla will remain available for reference in read-only mode. We will continue to work on open Bugzilla bugs, copy them to the new locations as needed for follow-up, and add the new items under Related Links.

Our sincere thanks to everyone who has contributed on this bug tracker over the years. Thanks also for your understanding as we make these adjustments and improvements for the future.

Please create a new report on GitHub or Developer Community with your current version information, steps to reproduce, and relevant error messages or log files if you are hitting an issue that looks similar to this resolved bug and you do not yet see a matching new report.

Related Links:

Description chenglon 2016-11-18 23:59:17 UTC
Created attachment 18552 [details]
Sample code.

Mono\Xarmin: treat the following url as absolute path which is wrong.
.Net\Visual Studio: treat the following url as relative path which is correct.

string addressString = "/catalog/shownew.htm?date=today";
// Parse the string and create a new Uri instance, if possible.
Uri result = null;
if (Uri.TryCreate(addressString, UriKind.RelativeOrAbsolute, out result))
// Check whether new Uri instance is absolute or relative.
if (result.IsAbsoluteUri)
	outputBlock += " is an absolute Uri.\n";
else {
	outputBlock += " is a relative Uri.\n";

Please run the attached sample app from both VisualStudio2015 on Windows and Xamarin 6.1.2 on Mac to compare the difference.
Comment 1 Marek Safar 2016-11-20 09:32:44 UTC
Please check explanation at http://www.mono-project.com/docs/faq/known-issues/urikind-relativeorabsolute/