C# 简化 switch 语句

Question

我可以以某种方式简化这个 switch 语句，因为这两种情况都只使用另一个函数参数做同样的事情吗？

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switch (data.Subscriber.Protocol)\n{\n    case "email json":\n        builder.Attachments.Add("O\xc4\x8ditanje.json", CraftAttachment(data));\n        break;\n    case "email text":\n        builder.Attachments.Add("O\xc4\x8ditanje.txt", CraftAttachment(data));\n        break;\n    default:\n        break;\n}\n

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Answer 1

像这样的事情怎么样：

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string attachmentName = data.Subscriber.Protocol switch\n{\n    "email json" => "O\xc4\x8ditanje.json",\n    "email text" => "O\xc4\x8ditanje.txt",\n    _ => null\n};\n\nif (attachmentName is not null)\n{\n    builder.Attachments.Add(attachmentName, CraftAttachment(data));\n}\n

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