New features:

• Made thread pool size configurable
• Command filter
• Connection filter
• Windows Azure support
• Made TCP keep alive options can be configurable
• Mono support (Mono 2.10 or later)
• Built-in Flash/Silverlight policy server
• Support multiple command assemblies
• Add more quickstart projects

Improvements:

• Using TPL to deal multiple threads issues
• Changed to process received data in working thread pool instead of completion port thread pool
• Simplified and improved asynchronous extension
• Improved performance log and data collecting API
• Improved session fetching performance by session snapshot
• Improved configuration code
• Simplified CustomProtocol implementation
• Improved CustomProtocol to support multiple commands in one receiving
• Allowed CommandLineProtocol's encoding customizable

Bug fixes:

• Fixed a bug that the method SendResponse(byte[] data) in UDP session hadn't been implemented
• Fixed a bug that extra logging directory will be created if there are multiple server instances
• Fixed bugs in receiving data in length or by mark

Other changes:

• Changed clearIdleSession's default configuration value to false
• Changed default charset of AppSession from default to UTF8
• Changed serviceName to name for service configuration node
• Shorten session log message