[c#] How to calculate route between two points offline?

Did you already read the routing wiki page? It even mentions some tools for C#, for example OsmSharp.

I was able to get a result in meters from the code below... however, it took 3.5 minutes to calculate the distance between two points that are 12357 meters apart.

I used the osm.pbf for Oklahoma that is 116mb.

Install VS 2012, Install NuGet Extension, Install OSMSharp via NuGet. Start a new windows app for C#:

using OsmSharp.Osm.PBF.Streams;
using OsmSharp.Routing.Osm.Interpreter;
using OsmSharp.Routing.TSP.Genetic;
using OsmSharp.Math.Geo;
using OsmSharp.Routing;

using System;
using System.IO;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {

            var frCoord = new GeoCoordinate(35.5275684, -97.5691736);
            var toCoord = new GeoCoordinate(35.5575105, -97.6740397);
            var f = new FileInfo("C:\\OSM\\oklahoma-latest\\oklahoma-latest.osm.pbf").OpenRead();
            var p = new PBFOsmStreamSource(f);
            var ri = new OsmRoutingInterpreter();

            var router = Router.CreateLiveFrom(p, ri);

            var resolved1 = router.Resolve(Vehicle.Car, frCoord);
            var resolved2 = router.Resolve(Vehicle.Car, toCoord);

            var route = router.Calculate(Vehicle.Car, resolved1, resolved2);

            label1.Text= Convert.ToString(route.TotalDistance);
        }


    }
}