Calculate distance of two geo points in km c#

Question

I`d like calculate the distance of two geo points. the points are given in longitude and latitude.

the coordinates are:

point 1: 36.578581, -118.291994

Answer 1

As you are using the framework 4.0, I would suggest the GeoCoordinate class.

// using System.Device.Location;

GeoCoordinate c1 = new GeoCoordinate(36.578581, -118.291994);
GeoCoordinate c2 = new GeoCoordinate(36.23998, -116.83171);

double distanceInKm = c1.GetDistanceTo(c2) / 1000;
// Your result is: 136,111419742602

You have to add a reference to System.Device.dll.