using System;

public class Program

{

    public static void Main()

    {

        var from = new DateTime(2023,4,2);

        var to = new DateTime(2024,4,1);

        var fullMonthsDiff = (to.Year - from.Year)*12 + to.Month - from.Month;

​

        //Compute difference between the % of day to full days of each month

        var fractionMonthsDiff = ((double)(to.Day-1) / (DateTime.DaysInMonth(to.Year, to.Month)-1)) -

            ((double)(from.Day-1)/ (DateTime.DaysInMonth(from.Year, from.Month)-1));

        var monthsApart = Math.Floor(fullMonthsDiff + fractionMonthsDiff);

        Console.WriteLine(monthsApart);

    }

}