How To Generate A Unique 4-Digit String
<p>I'm looking for a way to generate a (fairly) unique (non auto-incrementing) 4-digit string using the numbers 0 - 9 for each digit using C#.  I can validate uniqueness and generate another number if a dup is found.  I had thought about basing the number somehow on the DateTime object's Ticks property but am having a difficult time putting the pieces together.</p>

<p>Any thoughts or expertise would be much appreciated.</p>
