.NET Short Unique Identifier

c# .net uniqueidentifier
Noel picture Noel · Feb 14, 2012 · Viewed 113.5k times · Source

I need a unique identifier in .NET (cannot use GUID as it is too long for this case).

Do people think that the algorithm used here is a good candidate or do you have any other suggestions?

Answer

Dor Cohen picture Dor Cohen · Feb 14, 2012

This one a good one - http://www.singular.co.nz/blog/archive/2007/12/20/shortguid-a-shorter-and-url-friendly-guid-in-c-sharp.aspx

and also here YouTube-like GUID

You could use Base64:

string base64Guid = Convert.ToBase64String(Guid.NewGuid().ToByteArray());

That generates a string like E1HKfn68Pkms5zsZsvKONw==. Since a GUID is always 128 bits, you can omit the == that you know will always be present at the end and that will give you a 22 character string. This isn't as short as YouTube though.

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