.NET Compact Framework 3.5 已經支持 Windows Communication Foundation (WCF)了，這是 .NET CF 3.5 最讓人興奮的特性之一。不過，.NET CF 版的 WCF 是 .NET Framework 3.5 版 WCF 的功能子集。MSDN Library for Visual Studio 2008 Beta 2 (Development Tools and Languages|Visual Studio|.NET Framework Programming in Visual Studio|.NET Compact Framework|Application Development|Windows Communication Foundation (WCF) Development|Messaging in the .NET Compact Framework) 中是這樣描述的：
其中 Mail Binding 是很有意思的一個特性，我以前的隨筆有提過。不過這個功能需要跟 Exchange Server 配合使用，有一定的侷限性。WCF Exchange Server Mail Transport 使用方法可以參考 MSDN 文檔。
- The subset of Windows Communication Foundation (WCF) that is implemented in the .NET Compact Framework provides a unified programming model for building message-oriented applications. It enables developers to build secure messaging applications that work across platforms and that support interaction with existing WCF services on the desktop.
(譯文：.NET 精簡框架實現了 WCF 的子集，爲構建面向消息的應用程序提供了統一的編程模型。這使得開發人員能夠構建跨平臺的安全的消息應用程序，並且支持跟現有的運行在桌面平臺的 WCF 服務交互。)
WCF messaging layer on the .NET Compact Framework![]()
Support for the WS-Security version 1.0 specification includes SOAP message security using X.509 certificates. The Message class is built on the WS-Addressing standard.
MSDN Library for Visual Studio 2008 Beta 2 對 Compact WCF 與 Desktop WCF 之間的差異描述得不夠詳盡，只是簡單描述了一下架構和安全方面的不同。
今天發現有人整理了一個比較詳細的表格，供大家參考：
|
Feature |
Desktop WCF |
Compact WCF |
| Bindings: | ||
| · BasicHttpBinding | Yes | Yes |
| · CustomBinding | Yes | Yes |
| · WindowsMobileMailBinding | N/A | Yes |
| · ExchangeWebServiceMailBinding | Yes, via NetCF install | Yes |
| Formatters: | ||
| · SoapFormatter | Yes | Yes |
| · BinaryFormatter | Yes | No |
| Encoders: | ||
| · TextMessageEncoder | Yes | Yes |
| · BinaryMessageEncodingBindingElement | Yes | No |
| · MTOMEncoder | Yes | No |
| · GzipEncoder | Sample available | Sample available |
| Transports: | ||
| · HttpTransportBindingElement | Yes | Yes |
| · HttpsTransportBindingElement | Yes | Yes |
| · MailTransportBindingElement | Yes, via NetCF install | Yes |
| · MsmqTransportBindingElement | Yes | No |
| · TcpTransportBindingElement | Yes | No |
| · (other transports) | Yes | No |
| XmlDictionaryReader/Writer | Yes | Yes; stub around XmlTextReader/Writer |
| DataContractSerializer | Yes | No; but can be wire-compatible with DCS via XmlSerializer |
| Service proxy generation | Yes; via SvcUtil.exe | Yes; via NetCFSvcUtil.exe, not integrated into VS2008 |
| · Non-HTTP transports | Yes | No |
| · Custom headers | Yes | No |
| WS-Addressing | Yes | Yes |
| WS-Security message level security | ||
| · X.509 | Yes | Yes |
| · Username/password | Yes | No |
| · SecurityAlgorithmSuite.Basic256Rsa15 | Yes | Yes |
| · SecurityAlgorithmSuite.Basic256 | Yes | No |
| WS-ReliableMessaging | Yes | No |
| Patterns | ||
| · Service model | Yes | No |
| · Message layer programming | Yes | Yes |
| · Buffered messages | Yes | Yes |
| · Streaming messages | Yes | No |
| · Endpoint descriptions in .config files | Yes | No |
| Channel extensibility | Yes | Yes |
| Security channel extensibility | Yes | No |
其中 Mail Binding 是很有意思的一個特性，我以前的隨筆有提過。不過這個功能需要跟 Exchange Server 配合使用，有一定的侷限性。WCF Exchange Server Mail Transport 使用方法可以參考 MSDN 文檔。
