Function to generate alpha numeric sequence number based on input number
<p>I am trying to develope a routine in C# that will take a given input integer and return a 6 character alpha numeric string based on a predefined possible set of characters.</p>

<p>The possible characters to use are: </p>

<p>"0123456789ABCDEFGHJKLMNPQRSTUVWXYZ" (note that the letter "I" and "O" are not in the set.)</p>

<p>Therefore given the input of 1, the output should be "000001", input of 9 would output "000009", input of 10 would output "00000A", input of 12345 would output "000AP3", and so on.</p>

<p>I am having a hard time coming up with an elegant solution to this problem. I know I must be approaching this the hard way so I'm looking for some help.</p>

<p>Thanks!</p>
