using System;

using System.Text.RegularExpressions;

public class Program

{

    public static void Main()

    {

        const string input = @"Born to run";

        const string pattern = "Born(.{0,300})";

​

        var regex = new Regex(pattern);

        Match match = regex.Match(input);

        if (match.Success)

        {

            string capture = match.Groups[1].Value;

            Console.WriteLine(capture);

        }       

    }

}