无法定义recurses的扩展方法

Question

我想定义一个扩展方法,它递归到嵌套结构,你猜对了,异常.这就是我想做的......

class Utils
{
    public static string TellMeEverything(this Exception ex)
    {
        return ex.InnerException?.TellMeEverything() + ex.Message + ex.StackTrace;
    }
}

但是这会产生编译器错误 'Exception' does not contain a definition for 'TellMeEverything' and no extension method 'TellMeEverything' accepting a first argument of type 'Exception' could be found (are you missing a using directive or an assembly reference?)

这可能被视为编译器错误吗？

Answer 1

你class utils也应该将public static它作为一个扩展来发现System.Exception