using System;

using System.Text.RegularExpressions;

​

public class Program

{

    private static string EvalExpr(string sExpression)

    {

        Random random = new Random();

        bool bMatched;

​

        do

        {

            bMatched = false;

            sExpression = Regex.Replace(

                sExpression,

                @"\(([^()]*)\)",

                new MatchEvaluator(delegate(Match m)

                {

                    bMatched = true;

                    int randomNumber = random.Next(100);

                    string sRes = randomNumber<50 ? "0" : "1";

                    Console.WriteLine("Simulated response of {0}: {1}", m.Groups[0].Value, sRes);

                    return sRes;

                })

            );

        } while(bMatched);

​

        return sExpression;

    }

    public static void Main()

    {

        string sExpr = "((Loan number is 1000 And Lock Date is less than 12/03/2015) Or Borrower SSN contains 12345) And ((Buy date is between 12/01/2015 and 23/02/2016 And APR is less than 20000) Or Loan amount is greater than 60000)";

        Console.WriteLine(EvalExpr(sExpr));

    }

}