你好，
这个项目应该要分开部署的，每个层可以分开部署的，application层可以用WPF，Winforms，ASP.net等等来写，所以部署的文件会有所区别，data层是数据库，可以部署到data服务器上。
你可以用WCF进行通信，有关WCF的问题，你可以到WCF论坛寻求帮助。https://social.microsoft.com/Forums/zh-CN/home?forum=wcfzhchs
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