using System;

​

public class Program

{

    public static void Main()

    {

        var accurateDateTime = DateTime.UtcNow.AddMonths(-2).AddDays(9);

        Console.WriteLine("accurateDateTime"+accurateDateTime);

        var lastMonthEndDate=new DateTime(DateTime.UtcNow.Year, DateTime.UtcNow.Month, 1).AddMilliseconds(-1.0);

        var monthStart=new DateTime(lastMonthEndDate.Year,lastMonthEndDate.Month,1);

        var startDateOfPreviousMonth=monthStart;

        Console.WriteLine("startDateOfPreviousMonth-"+startDateOfPreviousMonth);

        DateTime now = DateTime.UtcNow;

        var startDate = new DateTime(now.Year, now.Month, 1);

        var endDate = startDate.AddMonths(1).AddDays(-1);

        var endDateOfCurrentMonth = endDate;

        Console.WriteLine("endDateOfCurrentMonth-"+endDateOfCurrentMonth);

        Console.WriteLine(accurateDateTime >= startDateOfPreviousMonth && accurateDateTime <= endDateOfCurrentMonth);

    }

​

}