Variations in .NET Compact Framework Versions
When developing applications for smart devices, make sure that you consider the possible variations in the installed versions of the .NET Compact Framework. For more information, see What's New in the .NET Compact Framework.
Support for Windows Communication Foundation (WCF).
Support for Language-Integrated Query (LINQ).
LINQ to XML and LINQ to DataSet are support. LINQ to SQL is not supported.
Support for new runtime tools.
Improved support for controls.
Support for SoundPlayer.
Support for compression.
Debugging and logging enhancements.
Improved error handling.