using System;

using System.Text.RegularExpressions;

public class Program

{

    public static void Main()

    {

        string teste = "01/03/2010 23:00";

        Match match = Regex.Match(teste.ToString(), @"^([1-9]|([012][0-9])|(3[01]))\/([0]{0,1}[1-9]|1[012])\/\d\d\d\d [012]{0,1}[0-9]:[0-6][0-9]$");

        if (match.Success)

        {

            Console.WriteLine("data valida");

        }

    }

}