Extracting json date format from string and replace with normal date format

Hi All ,
I found the solution .If anybody having the issue try with this code it will work for any length of string.
//result is the your string in which u want to replace json date formats to normal date format

string p = @"\\/Date\((\d+)\+\d+\)\\/";
MatchEvaluator matchEvaluator = new MatchEvaluator(ConvertJsonDateToDateString);
Regex reg = new Regex(p);
result = reg.Replace(result, matchEvaluator);

private static string ConvertJsonDateToDateString(Match m)
{
string result = string.Empty;
DateTime dt = new DateTime(1970, 1, 1);
dt = dt.AddMilliseconds(long.Parse(m.Groups[1].Value));
dt = dt.ToLocalTime();
result = dt.ToString("yyyy-MM-dd HH:mm:ss");
return result;
}

Regards
Vijay