目录背景过程1、关闭sql server服务2、打开控制面板，卸载SQL Server3、手动删除 SQL Server 遗留文件4、清空注册表5、重启计算机以确保所有更改生效。总结背景
Assuming I create a method which is passed an object and that method would perform an action depending on the object passed. How should I identify the object?
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