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Delete the first line of a text file without reading it

marcel ethan185330-Jan-2014

I'm working with a very large text file (around 70 thousand lines) and I want to remove the top line.

Clearly, loading the entire thing into memory, deleting the top line, then re-writing the whole thing again is inefficiant:

var lines = File.ReadLines(accountFileLocation.Text).Skip(1);

File.WriteAllLines("output.txt", lines);

Is there any other way to do it?

Updated on 30-Jan-2014

Can you answer this question?

Answer

30-Jan-2014

Hi Marcel,

Try this:

List lines = File.ReadAllLines(Filename).ToList(); And remove the [0] index from the list create file again

File.WriteAllLines(Filename, lines.ToArray());