Cartesian product of string[] with itself without duplicate/clone directly in C#

Question

Please excuse my lack of better terminology. I have a string[] and I\'d like to get the product of a catesian join with itself for later to put in a dictionary.

Answer 1

I'm not sure it has a name, but you can use a Where clause to filter out those matching values.

string[][] arrayOfArrays =
    array1.SelectMany(left => array1, (left, right) => new string[] { left, right })
          .Where(x => x[0] != x[1])
          .ToArray();