How to retrieve key & value from List module programatically.

If I use TryGetValue(), I seem to have to pass the key as >, for which I need to know the value.

ListController lc = new ListController();
Dictionary MyListInfo= lc.GetListEntryInfoDictionary("ListName");

if (MyListInfo.TryGetValue("MyListInfo:somevalue", out value))
{
string getValue= value.value;
}