How does DateTime.Now.Tick exactly work?

Posted by Roflcoptr on Stack Overflow See other posts from Stack Overflow or by Roflcoptr
Published on 2010-12-29T12:36:40Z Indexed on 2010/12/29 12:54 UTC
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c#

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.NET

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datetime

In my application I generate files at random opportunities. To ensure a unique naming, I tried to use the nano seconds since 1.1.1970:

long time = DateTime.Now.Ticks;
String fileName = Convert.ToString(time);
Console.WriteLine(fileName);

Now I observed something weird. Why is the output like that? I mean why are the last 4 numbers always the same? I can use this as a filename, that is not the problem, but I'm just wondering about it.

634292263478068039
634292263512888039
634292263541368039
634292263603448039
634292263680078039

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