using System;

public class Program

{

    public static void Main()

    {

        int currentQuarter = (DateTime.Now.Month - 1) / 3 + 1; 

        DateTime nextQuarterStartDate = new DateTime(DateTime.Now.Year, currentQuarter * 3 + 1, 1);  

​

        DateTime currentQuarterEndDate = nextQuarterStartDate.AddDays(-1);          

        Console.WriteLine(currentQuarter);

        Console.WriteLine(nextQuarterStartDate);

        Console.WriteLine(currentQuarterEndDate);

    }

}