How to sort List> according to List number of fields?

Question

How do I sort List> according to number of fields?

The list got structure like

a|b|c|d|eeee|rere|ewew|
ewqewq|ewew|
ewew|ewewewewew|
<         


        

Answer 1

Just a minor adjustment, checking for null while also

        List> listOfLists = new List>();

        List list1 = new List();
        list1.Add("elem 1 1");
        list1.Add("elem 1 2");
        list1.Add("elem 1 3");

        List list2 = new List();
        list2.Add("elem 2 1");
        list2.Add("elem 2 2");
        list2.Add("elem 2 3");
        list2.Add("elem 2 4");

        listOfLists.Add(list1);
        listOfLists.Add(null); // list can contain nulls
        listOfLists.Add(list2);
        listOfLists.Add(null); // list can contain nulls

When you have null lists in the list of lists, you might want to make them lower priority than empty lists, by interpreting null.Count as -1, or NOT

        int nullListElems = -1; 
        //int nullListElems = 0; 

        listOfLists.Sort((l1,l2)=> 
            l1 == null ? 
            nullListElems : 
            l1.Count.CompareTo(
                l2 == null ? 
                nullListElems : 
                l2.Count));