Question: How / where do I store settings in a windows mobile 6 application (targeting compact framework 3.5)?

Is there some mechanism like the properties.settings for desktop?

Answer: 
Unfortunately, the System.Configuration is missing from .NET Compact Framework.

You can use the [Smart Device Framework](http://www.opennetcf.com/Products/SmartDeviceFramework/tabid/65/Default.aspx) or you can just create a class that stores your settings and the save it and load it using a [XmlSerializer](http://msdn.microsoft.com/en-us/library/system.xml.serialization.xmlserializer.aspx).
It would be best to use the config settings class to do the job for you. Alternatively, for more flexibility, use an INI class handler (there are a good few out there, look for Windows mobile platform portability). [Nini](http://nini.sourceforge.net/) would be your best bet! Hope this helps, Best regards,
 Tom.