https://medium.com/%E9%96%92%E8%AB%87%E8%BB%9F%E9%AB%94%E6%9E%B6%E6%A7%8B/%E9%96%92%E8%AB%87%E8%BB%9F%E9%AB%94%E6%9E%B6%E6%A7%8B-plug-in-ed2cbce7464a https://code-maze.com/csharp-plugin-architecture-pattern/ plugin1 1plugin1 2
