string strInput = @"selfDiscountInfoId:'',discount:'40',urgency:'false',isApplyKSeat:'false'";
        string strPattern = "discount:'([^']+)',urgency:'([^']+)'";
        Regex reg = new Regex(strPattern);
        Match m = reg.Match(strInput);
        string strCount = m.Groups[1].Value;
        string strGency = m.Groups[2].Value;

------解决方案--------------------
C# code
        string s = "selfDiscountInfoId:'',discount:'40',urgency:'false',isApplyKSeat:'false'";
        Match match = Regex.Match(s, @"discount:'(?<discount>.*?)',urgency:'(?<urgency>.*?)'");
        Response.Write(match.Groups["discount"].Value + "<br/>" + match.Groups["urgency"].Value);