A CS development framework based on small-to-medium sized refining, covering computer-side, web-side, and mobile-side full-platform system templates, will include some commonly used repetitive function codes, such as network communication mechanisms, in most one-to-many system designs. Client version control, account control management, password modification, announcement management, server configuration, various common windows, etc., and most small and medium-sized systems just need simple rights management. This framework contains four client-side modes, the first commonly used winform client, the second is the wpf client, the third is the asp.net mvc mode, and the fourth is the client of the Android platform. You can choose a mode on winform and wpf clients, then your system provides some functions (such as report viewing) to asp.net, and then provide an Android app for mobile phone use, if the server is assumed in the cloud, all People can interact with anytime, anywhere, data flow, all account models are unified, the browser is also convenient for some people who only need to view the report users do not need to deploy the client. Of course, the client can provide more powerful features.