Question

Okay, just learnt LINQ syntax about ten minutes ago, made a first program:

public static void Main(string[] args)
{   
    char[] letters = {'d','a','C','n','D','e','R','f'};

    List<char> tokens = 
        (from l in letters
         where char.IsLower(l)  
         select l).ToList();
}

Now, as I was skimming through it, I saw an orderby keyword. But I can’t grasp it’s usage or capabilities. For example, in this case, can it be used to alphabetically order the tokens? If so, then how?

Answer 1

var tokens = 
        (from l in letters
         where char.IsLower(l)
         orderby l
         select l).ToList();

This will sort it according to ASCII value. If you want to sort simply, alphabetically try this:

var tokens = 
        (from l in letters
         orderby char.ToLower(l)
         select l).ToList();

this will take all chars from letters, not only these where char.IsLower(l) == true