如何处理类型"Object {System.Collections.Generic.List< object>}"

这是我第一次遇到这样的物体.

This is my first time encountering with such an object.

>调试期间我的本地窗口的图像链接<

因此，很简单地说，当唯一的"test"给出的方法与普通对象完全相同，并且我不知道要强制转换时，如何访问CardNO或ItemID的值，分别为296和130.它来.我什至不能做这个'test [0]'.

So to put it very simply, how do I access the value for CardNO or ItemID, which is 296 and 130 respectively when the only methods 'test' give are exactly like a normal object and I don't know what to cast it to. I can't even do this 'test[0]'.

这是测试"的来源:

private void ListBoxIssue_OnDragEnter(object sender, DragEventArgs e)
    {
        var test = DragDropPayloadManager.GetDataFromObject(e.Data, typeof(CommsItem));
    }