[Solved] replace string by index of this string [closed]

by


You could use Regex.Replace(String, String, Int32) for this, execute until all of the intended replacements from arr are replaced.

var text = File.ReadAllText("file.txt");
var arr = new[] { "A", "B", "A" };
var regex = new Regex("b");
for(int i = 0; i < arr.Count; i++)
    text = regex.Replace(text, arr[i].ToString(), 1);

Tip: Never answer when tired…

solved replace string by index of this string [closed]