小编Evk*_*Evk的帖子

一段C#代码

var isTrue = (new List<int>{1,2,3} is IEnumerable<object>);

我得到false了代码执行的结果,但是当我将该代码复制到WATCH窗口时,结果是true.

目前我有两种方式:

1. 当我设置我的web.config cookieless="UseCookies"我的网址看起来:

   http://example.com/Stuff

   <sessionState timeout="60" cookieless="UseCookies"/>

2. 当我设置cookieless="true"我有这样的网址

   http://example.com/%28S%28uanyuxwgaviyonky0lxwq3vq%29%29/Stuff

   <sessionState timeout="60" cookieless="true"/>

我可以设置cookieless属性动态吗？就像是

if(/*condition*/)
{
    sessionState .cookieless = "true";
}
else
{
    sessionState .cookieless = "UseCookies";
}

这必须是SessionStartGlobal.asax中的某个地方

为什么我的weakRef.Target在第二次射击时仍然存在？

这可能是一个错误吗？如果不是，错误在哪里？

结果：

weakRef.Target is alive = True, expected true because inst keep a hold on SomeClass.
weakRef.Target is alive = True, expected false, because there is no more ref on SomeClass.

代码：

public static class DelegateKeeper
    {
        private static ConditionalWeakTable<object, Action> cwtAction = new ConditionalWeakTable<object, Action>();
        public static void KeepAlive(Action action) => cwtAction.Add(action.Target, action);
    }

    public class SomeClass
    {
        public void DoSomething() { }
    }

    public static class GcHelper
    {
        public static void Collect()
        {
            // OK surely overkill …