是否可以在编译时检查类型是否标记有可序列化属性
具体来说，我们正在使我们的应用程序与进程外会话状态服务器兼容，其中会话中保存的所有类型都必须是可序列化的。
有没有一种方法可以在编译时查看放入 HttpSessionState 的任何类型都标记有可序列化属性。类似于此“无效”代码的内容
public static void Put<T>( string key, T value ) where T : IsMarkedWitheSerializableAttribute
{
HttpContext.Current.Session[key] = value;
}
Specifically we're making our application compatible with the Out Of Process Session State server where all types saved in session must be serializable.
Is there a way to see at compile time that any type put into HttpSessionState is marked with the Serializable attribute. Something along the lines of this 'non-valid' code
public static void Put<T>( string key, T value ) where T : IsMarkedWitheSerializableAttribute
{
HttpContext.Current.Session[key] = value;
}
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不，不存在这样的通用约束。属性通常用于指示有关类型的实现。您必须引入自己的标记接口（呃）或插入执行时间检查并希望您的测试足够。
Eric Lippert 关于属性和属性的帖子 很适合在这里阅读。这不是完全相同的问题，因为它更多地讨论对象与类型，但它在表达机制的属性方面仍然相关。
No, there's no kind of generic constraint like that. Attributes are generally meant to indicate something about the implementation of a type. You'll have to either introduce your own marker interface (urgh) or insert an execution-time check and hope that your testing is sufficient.
Eric Lippert's post about properties and attributes is good to read here. It's not quite the same question, as it's talking more about objects vs types, but it's still relevant in terms of attributes expressing mechanics.
您可以编写自定义 FxCop 规则来生成针对此场景的警告。
Jason Block 他的网站上有一个示例规则。
You could write a custom FxCop rule to generate warnings for this scenario.
Jason Block has a sample rule on his site.