Which is the best method of editing a text file using System.IO   ?
I want to edit some existing lines in it and save.

TIA,
NumLock

    I would use the FileStream class to create the underlying stream, and
then use a StreamWriter class to write the text.  Just make sure that you
are using the correct encoding when you write to the underlying stream.

    Hope this helps.

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               - Nicholas Paldino [.NET/C# MVP]