Bug 41429 - LastIndexOf doesn't work properly
Summary: LastIndexOf doesn't work properly
Alias: None
Product: iOS
Classification: Xamarin
Component: BCL Class Libraries ()
Version: XI 9.6 (iOS 9.3)
Hardware: PC Windows
: --- normal
Target Milestone: Untriaged
Assignee: Marek Safar
Depends on:
Reported: 2016-06-01 11:03 UTC by Ivan Icin
Modified: 2016-06-02 13:01 UTC (History)
3 users (show)

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

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Description Ivan Icin 2016-06-01 11:03:49 UTC
feedString.IndexOf(@"</feed>", 0, StringComparison.OrdinalIgnoreCase) returns some positive value and

feedString.LastIndexOf(@"</feed>", 0, StringComparison.OrdinalIgnoreCase) returns -1

You can try on any Atom feed e.g. http://www.theverge.com/rss/index.xml to get feedString to reproduce the problem.
Comment 1 Marek Safar 2016-06-02 13:01:27 UTC
This is correct behaviour.

You are looking for a text using backward search starting at index 0. There is no text before index 0 therefore you always get -1 as a result.