Possible Duplicate: Removing the first line of a text file in C# What would be the fastest and smartest way to remove the first line from a huge (think 2-3 GB) file? I think, that you probably can't avoid rewriting the whole file chunk-by-chunk, but I might be wrong. Could using memory-mapped files somehow help to solve this issue? Is it possible to achieve this behavior by operating directly on the file system (NTFS, for example) - say, update the corresponding inode data and change the file starting sector, so that the first line is ignored? If yes, would this approach be really fragile or there are many other applications, except the OS itself that do something similiar?

Remove first line from a file

Possible Duplicate:
Removing the first line of a text file in C#

What would be the fastest and smartest way to remove the first line from a huge (think 2-3 GB) file?

I think, that you probably can't avoid rewriting the whole file chunk-by-chunk, but I might be wrong.
Could using memory-mapped files somehow help to solve this issue?
Is it possible to achieve this behavior by operating directly on the file system (NTFS, for example) - say, update the corresponding inode data and change the file starting sector, so that the first line is ignored? If yes, would this approach be really fragile or there are many other applications, except the OS itself that do something similiar?