how to replace a word in specific line in text file

[Houssem12]

in text file i have multiline

so i want in of each line where "faux" will be replaced with "ok"

1 abc abc abc 5 6 faux

2 abc abc abc 5 6 faux

with the number that i have i will change faux with ok

something like this but with point to the number that i put it in first place of line

My.Computer.FileSystem.WriteAllText(TextBox1.Text, My.Computer.FileSystem.ReadAllText(TextBox1.Text).Replace("faux", "ok"), False)

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