Reading and Write specific lines to text file C# -

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i have master file called filename ids of people. in sorted order. want divide ids 27 chunks , copy each chunk different text file.

using (filestream fs = file.open(filename, filemode.open, fileaccess.read, fileshare.readwrite))          {             string line;       int numoflines = file.readalllines(filename).length;  -- have 73467        int eachsubset = (numoflines / 27);        var lines = file.readalllines(datafilename).take(eachsubset);        file.writealllines(filename1,lines);       }

i have 27 different text files. want 73467 of ids divided equally , copied on 27 different files. so, 1st file have id#1 id#2721 2nd dile have id#2722 id#(2722+2721) , on. not know how automate , run quickly.

thanks hr

the simplest way run file.readline , writeline inside loop , decide file receive line.

i wouldn't recommend parallelize routine since it's io operation, copy of lines pretty fast.


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