c# - exception on accessing dictionary from list -

using system; using system.collections.generic; using system.linq; using system.text; using system.threading.tasks;  namespace test {     class program     {         static void main(string[] args)         {             list<object> list = new list<object>();             list<dictionary<string, object>> dict = new list<dictionary<string, object>>();              dictionary<string, object> master = new dictionary<string, object>();             master.add("list", list);             master.add("dict", dict);              list<object> mydict = (list<object>)master["dict"]; // exception             console.write("count: ", mydict.count);         }     } } 

it throwing exception on bold line. why behaviour , how shall access element? sumanth

because there no list<object> under dict key

var mydict = (list<dictionary<string, object>>)master["dict"];