using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

        string txtJoinedDateText = "2014/10/27";

        var member = new Member();

        member.JoinedDate = DateTime.Parse(txtJoinedDateText);

        Console.WriteLine(member.JoinedDate);

    }

}

​

public class Member {

    public DateTime? JoinedDate {get; set; }

}