正则式记录

        [TestMethod]
        public void UnitTest()
        {
            var subString = "2017/10/1 0:00:00-2017/10/31 0:00:00";
            Regex regexObj = new Regex("(?<year>\\d{2,4})/(?<month>\\d{1,2})/(?<day>\\d{1,2})");
            try
            {
                string resultString = regexObj.Replace(subString, new
                    MatchEvaluator(ComputeReplacement));
                Debug.WriteLine(resultString);
            }
            catch
            {

            }
        }
        public string ComputeReplacement(Match matchResult)
        {
            Regex innerRegex = new Regex("/");
            return innerRegex.Replace(matchResult.Value, "-");
        }