in c#, how can i build up array from A to ZZ that is similar to the way that excel orders columns

Question

i am looking for code that can generate an array where the first item is A, then B, then C . . .after Z i

Answer 1

Great answer of Vlad.

Here's another variation on that:

 static IEnumerable generate() {
   for (char c = 'A'; c <= 'Z'; c++) {
     yield return c.ToString();
   }

   foreach (string s in generate()) {
     for (char c = 'A'; c <= 'Z'; c++) {
       yield return s + c;
     }
   }
 }

If you don't mind starting the sequence with an empty string you could write it as follows:

 static IEnumerable generate() {
   yield return "";

   foreach (string s in generate()) {
     for (char c = 'A'; c <= 'Z'; c++) {
       yield return s + c;
     }
   }
 }