using System;                   

​

public class Program

{

    public static void Main()

    {

        Boolean isFinished = false;

        string dealYear = "2017";

        string dealMonth = "6";     

​

        DateTime procDateTime = new DateTime(Convert.ToInt32(dealYear), Convert.ToInt32(dealMonth), 1);     

​

        TimeSpan timeSpan;      

​

        while(!isFinished)

        {

            timeSpan = DateTime.Now.AddDays(1-DateTime.Now.Date.Day) - procDateTime;        

​

            if (timeSpan.Days <= 0)

            {

                isFinished = true;

​

            } 

            else 

            {

                procDateTime = procDateTime.AddMonths(1);                       

​

                isFinished = false; 

                Console.WriteLine("뭔가 한다! | " + procDateTime.ToString() + " | " + timeSpan.Days.ToString());                

            }

        }       

​

    }

​

}