WCF 4.0 new enhancements over WCF 3.5

Question

What are the new enhancements in WCF 4.0 and how easy would it be to upgrade existing WCF services to 4.0?

Answer 1

• Simplified configuration
• Standard endpoints
• IIS hosting without an SVC file
• Discovery
• Routing service (previously included with Dublin)
• REST caching and help page
• Workflow services
• Non-destructive queue receive
• Simple byte stream encoding
• ETW tracing