你好：
silverlight链接access数据库比较困难。应为通常的WCF方法不支持access.
我推荐你用SQL Express edition，存储数据文件在app_data文件夹。
如果你坚持用Access的话，你可以考虑用RIA Services，比如读取数据使用ADO.NET, 在手动创建DTO (RIA entities)并映射Access 数据到你的 entities。
如下列举了两个相关问题的帖子，请参照：
http://social.msdn.microsoft.com/Forums/en-US/af8fdff4-53c0-4a79-8fb6-ea8e42a476a4/silverlight-with-ms-access-database?forum=silverlightwcf
http://social.msdn.microsoft.com/Forums/en-US/540ae158-85e6-4023-8d7e-1f0a10174ff0/wcf-and-ms-access-database?forum=silverlightweb
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