How to compare DateTime in C# Ignoring milliseconds

DateTimeComparisonExtensions.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Utils
{
	public static class DateTimeComparisonExtensions
	{
		public static bool EqualsUptoSeconds(this DateTime dateTime, DateTime dateTimeToCompare)
		{
			if (dateTime.Date != dateTimeToCompare.Date) return false;
			if (dateTime.Hour != dateTimeToCompare.Hour) return false;
			if (dateTime.Minute != dateTimeToCompare.Minute) return false;
			if (dateTime.Second != dateTimeToCompare.Second) return false;

			return true;
		}

	}
}