Alphanumeric Counter
<p>I am trying to create in C# an alphanumeric counter that creates numbers in the following way:</p>

<pre>
0001
0002
0003
...
9999
A000
A001
...
A999
B000
...
</pre>

<p>The last number would be ZZZZ. So it would 0-9 first, then A-Z after that.</p>

<p>I am lost on how this can be done.</p>
