using System;

public class Program

{

    public static void Main()

    {

        string dateString = "2018-05-28";

        var date = DateTime.ParseExact(dateString, "yyyy-MM-dd", System.Globalization.CultureInfo.InvariantCulture);

        int year = date.Year;

        int month = date.Month;

        int day = date.Day;

        Console.WriteLine("Year: "+year);

        Console.WriteLine("Month: "+month);

        Console.WriteLine("Day: "+day);

    }

    public string ConvertDateToYear(string dateString)

    {

        DateTime date = DateTime.ParseExact(dateString, "yyyy-MM-dd", System.Globalization.CultureInfo.InvariantCulture);

        return date.Year.ToString();

    }

}