Windows/C# system-level sequential number generato

Question

Is there a managed system-level sequential number generator? DateTime.Now.Ticks won't do because the operations I'm doing sometimes occur more than once per tick.

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Requirement Clarifications:

• Process agnostic - there's really only one process that would be accessing this.
• Performance is critical! This is used for logging impressions on an adserver, which can reach 1k/sec

It would need to be one of the following:

• A 4-byte sequential number that resets every tick
• A 12-byte sequential number - essentially adding 4 bytes of granularity to a DateTime

Answer 1

I think the closest thing is a guid, which as I'm sure you're aware is at best only partially sequential.