using System;

using System.Globalization;             

public class Program

{

    public static void Main()

    {

        string[] formats = {"yyyy/MM/dd", "dd-MM-yyyy",

                            "dd/MM/yyyy"

                           };

        DateTime dataNow = DateTime.Now;

        DateTime vDate;

        DateTime dataVal;

        string iDate = "2012-07-15 00:00:00.000";

              foreach (string dateStringFormat in formats)

                {

                    if (DateTime.TryParseExact(iDate, dateStringFormat,

                                       CultureInfo.InvariantCulture,

                                       DateTimeStyles.None,

                                       out vDate))

                    {

                        var teste = true;

                        DateTime oDate = DateTime.ParseExact(iDate, dateStringFormat, CultureInfo.InvariantCulture, DateTimeStyles.None);

                        double days = (dataNow - oDate).TotalDays;

                      Console.WriteLine(oDate);

                         Console.WriteLine(String.Format("{0:dd-MM-yyy}", oDate));

                        Console.WriteLine(String.Format(oDate.ToString("dd-MM-yyyy")));

                        Console.WriteLine("Mês: " +oDate.Month);

                        Console.WriteLine("Dia: "+ oDate.Day);

                        Console.WriteLine("Dias diff: "+ days.ToString());

​

                    }

                    else

                    {

                        var teste2 = false;

                    }

​

                }

    }

}