How to generate unique (short) URL folder name on the fly...like Bit.ly -

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i'm creating application create large number of folders on web server, files inside of them.

i need folder name unique. can guid, want more user friendly. doesn't need speakable users, should short , standard characters (alphas best).

in short: i'm looking bit.ly unique names:

www.mydomain.com/abcdef

is there reference on how this? platform .net/c#, ok help, references, links, etc on general concept, or overall advice solve task.

start @ 1. increment 2, 3, 4, 5, 6, 7,

8, 9, a, b...

a, b, c...

x, y, z, 10, 11, 12, ... 1a, 1b,

you idea.

you have synchronized global int/long "next id" , represent in base 62 (numbers, lowercase, caps) or base 36 or something.


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