Best way to provide software settings?

Posted by claws on Stack Overflow See other posts from Stack Overflow or by claws
Published on 2010-03-31T19:09:04Z Indexed on 2010/03/31 19:13 UTC
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I'm using C# .NET.

In my software I'm providing settings dialog through which user can set the application settings which I want to save to a file.

Requirements (typical):

Every class I defined uses some part of these settings. So, these should be global to all classes.
These should be loaded while software is started.
When ever user changes settings and clicks 'save'/'apply'. Current settings should change.

I am wondering what is the best way to do this? Also, what is the best way to save these settings to disk? I mean should I create a Settings class object and serializing it to 'settings.dat' or provide an structured file like XML/JSON

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