RIATasks: A Simple Silverlight CRUD Example (using View Model)
http://www.codeproject.com/Articles/90071/RIATasks-A-Simple-Silverlight-CRUD-Example-using-V
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http://www.veryhuo.com/a/view/35954.html
怎样使用.NET RIA Services 创建 Silverlight Business Application(一)
http://www.cnblogs.com/ysisl/archive/2009/11/01/1594213.html