Geocoordinate does not contain a definition for Getdistanceto

Question

I’m trying to make an algorithm that calculates the distance between two points from their coordinates (Latitude and Longitude), in my researches I ended up coming across Geocoordinate (https://docs.microsoft.com/en-us/dotnet/api/system.device.location.geocoordinate?redirectedfrom=MSDN&view=netframework-4.8). However I am not able to use the function GetDistanceTo.

Error :

"Geocordinate" does not contain a definition for "Getdistanceto" and was not can find no method of extension "Getdistanceto" that accept a first argument of the type "Geocoordinate"

Code c#:

using Nest;
using System;

namespace Gps
{
    class Program
    {
        static void Main(string[] args)
        {
            double long1 = -38.527498;
            double lat1 = -3.734876;
            double long2 = -38.529240;
            double lat2 = -3.743198;

            var locA = new GeoCoordinate(lat1, long1);
            var locB = new GeoCoordinate(lat2, long2);

            double distance = locA.GetDistanceTo(locB);
        }
    }
}

I think it must be bullshit, but I’ve already spent a lot of time trying to solve this problem, I thank you in advance if someone can help me pointing out where the mistake is.

Answer 1

You have created a console solution that uses only the core of . NET Framework, which prevents you from adding references to assemblies because the purpose of this type of application is to be compatible with Mono.

When trying to use type GeoCoordinate in this type of application Intellisense informs the error and suggests installing the package Nest which has an incomplete version of the class GeoCoordinate.

To use the class GeoCoordinate first you have to create the right type project:

The correct is the project in which it is written Console App(.NET Framework)

Created this project add the reference to Assembly System.Device, which is where Namespace is located System.Device.Location, and reference the namespace System.Device.Location in your code.

Then your code will work smoothly.

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


namespace Gps
{
    class Program
    {
        static void Main(string[] args)
        {
            double long1 = -38.527498;
            double lat1 = -3.734876;
            double long2 = -38.529240;
            double lat2 = -3.743198;

            var locA = new GeoCoordinate(lat1, long1);
            var locB = new GeoCoordinate(lat2, long2);

            double distance = locA.GetDistanceTo(locB);
            Console.WriteLine("A distancia é:" + distance);
            Console.ReadLine();
        }
    }
}