how do I find the difference between 2 dates

DateTime compareTo = DateTime.Parse("07/08/2021 05:05:00 AM");
DateTime now = DateTime.Now;
var dateSpan = DateTimeSpan.CompareDates(compareTo, now);
Console.WriteLine("Date diffrence between dt:" + compareTo + " and dt:" + now);
Console.WriteLine("Years: " + dateSpan.Years);
Console.WriteLine("Months: " + dateSpan.Months);
Console.WriteLine("Days: " + dateSpan.Days);
Console.WriteLine("Hours: " + dateSpan.Hours);
Console.WriteLine("Minutes: " + dateSpan.Minutes);
Console.WriteLine("Seconds: " + dateSpan.Seconds);
Console.WriteLine("Milliseconds: " + dateSpan.Milliseconds);

The DateTime.Subtract method is available in all versions of C#. It is a method provided by the DateTime structure in the .NET Framework, and it has been available since the earliest versions of .NET.

You can use the DateTime.Subtract method to calculate the difference between two dates in any version of C# without any compatibility issues.

DateTime date1 = new DateTime(2023, 6, 1);
DateTime date2 = new DateTime(2023, 7, 13);

TimeSpan difference = date2.Subtract(date1);

Console.WriteLine("The difference is: " + difference.TotalDays + " days.");

DateTime date1 = new DateTime(2023, 7, 1);
DateTime date2 = new DateTime(2023, 7, 10);

TimeSpan difference = date2 - date1;

Console.WriteLine("The difference is: " + difference.Days + " days.");

Hope this helps !