Lexicographically sorted list of lists of strings

Question

Currently, I am trying to implement a code to generate frequent sequences. In doing so I need to get an in-place sort of a list of lists of strings as follows:

Answer 1

If you want to solve with Sort() you may use this approach

myList.Sort((x, y) => x.Zip(y,(l1,l2) => string.Compare(l1,l2)).FirstOrDefault(c => c != 0));

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Otherwise I would concartenate all items into a single string and compare those.

This is less efficient because the string objects have to be created first.

 myList = myList.OrderBy(string.Concat).ToList();

Sample: https://dotnetfiddle.net/1VmohI