Split large file into smaller files by number of lines in C#?

Question

I am trying to figure out how to split a file by the number of lines in each file. THe files are csv and I can\'t do it by bytes. I need to do it by lines. 20k seems to be a goo

Answer 1

int index=0;
var groups = from line in File.ReadLines("myfile.csv")
             group line by index++/20000 into g
             select g.AsEnumerable();
int file=0;
foreach (var group in groups)
        File.WriteAllLines((file++).ToString(), group.ToArray());