title: in c#, how can i build up array from A to ZZ that is similar to the way that excel orders columns
body: <p>i am looking for code that can generate an array where the first item is <strong>A</strong>, then <strong>B</strong>, then <strong>C</strong> . . .after <strong>Z</strong> it would then go to <strong>AA</strong>, then <strong>AB</strong> then <strong>AC</strong> . . .  all the way up to <strong>ZZ</strong>.</p>
  
  <p>what is the best way of doing this in C#?</p>