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Asked: 2026-05-11T02:20:07+00:00

I need to read in a rolling log file in .NET 3.5sp1. I’m wondering

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I need to read in a rolling log file in .NET 3.5sp1. I’m wondering what’s the best way to do this? The file can get really big. An idea I had was to

  • Open File
  • Read file to last read line (in the first case, it was 0)
  • Read all remaining lines
  • Close stream and remember the last line number read.
  • Wait a bit.
  • Rinse/repeat.

I’m not sure if this the best way though and efficient for the memory, considering the file can be pretty huge. And I can’t have the log file being locked either 🙁

Thoughts?

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1 Answer

  1. Get the file length and read the last piece of the file. It won’t be hard to find the first line break and show everything from there on. FileStream has a Length property, and the read method allows you to read from one place to another.

    Steven is right. If the other program doesn’t require exclusive access, you can open read-only and be fine.

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