using System;
using System.Text.RegularExpressions;
public class Test
{
public static void Main()
{
Regex rx = new Regex("(?<=^.{10}).*");
String a = rx.Replace("Hello", "...");
String b = rx.Replace("Quick brown fox jumps over the lazy dog", "...");
Console.WriteLine("'{0}'", a);
Console.WriteLine("'{0}'", b);
}
}
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