c# - Why are attribute classes in Json.Net sealed?

Question

Is there any spesific reason why e.g. Newtonsoft.Json.JsonIgnoreAttribute is a sealed class? The reason I ask is because I'd like to make wrapper around the Json.Net calls, so that the assembly ref is in one assembly only (makes updating the assembly and testing a bit easier).

Answer 1

因为通常这意味着它们没有（或服务于）没有被扩展/专门化的目的（就像 .NET BCL 中存在的许多属性类型一样）。