c# - C#4 中的动态关键字是否支持扩展方法？

Question

我是 listening to a talk关于 C#4 的 dynamic 关键字，我想知道...此功能是否与其他 .NET 功能正交，例如它是否支持扩展方法？

public static class StrExtension {
    public static string twice(this string str) { return str + str; }
}
...
dynamic x = "Yo";
x.twice(); // will this work?

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注意:这个问题是在 C#4 发布之前提出的，这就是为什么它用将来时来表达的原因。

Answer 1

来自"New Features in C# 4" word doc :

Dynamic lookup will not be able to find extension methods. Whether extension methods apply or not depends on the static context of the call (i.e. which using clauses occur), and this context information is not currently kept as part of the payload.