using System;

using System.Device.Location;

public class Program

{

    public static void Main()

    {

        // Columbia, SC -> 34.0007° N, 81.0348 W

        // Ridgeville, SC -> 33.0957° N, 80.3154° W

        var seachGeoCoordinate = new GeoCoordinate(34.0007, 81.0348);

        var locationGeoCoordinate = new GeoCoordinate(33.0957, 80.3154);

        var haversineDistance = seachGeoCoordinate.GetDistanceTo(locationGeoCoordinate) / 1609.0;

        Console.WriteLine(haversineDistance);

    }

}