using NetTopologySuite.Geometries;

using NetTopologySuite.LinearReferencing;

using NetTopologySuite.Operation.Distance;

using System;

​

class Program

{

    static void Main(string[] args)

    {

       // Create a line geometry with latitude and longitude coordinates

        var factory = new GeometryFactory(new PrecisionModel(), 4326); // 4326 is the SRID for WGS84

        var line = factory.CreateLineString(new Coordinate[]

        {

            new Coordinate(-73.9857, 40.7484), // Example: New York, NY

            new Coordinate(-118.2500, 34.0522) // Example: Los Angeles, CA

        });

​

        // Create a point with latitude and longitude coordinates

        var point = new Coordinate(-96.7970, 32.7767); // Example: Dallas, TX

​

        // Create a LocationIndexedLine from the line geometry

        var locationIndexedLine = new LocationIndexedLine(line);

​

        // Project the point onto the line

        var projectedLocation = locationIndexedLine.Project(point);

        var projectedCoordinate = projectedLocation.GetCoordinate(line);

​

        // Output the result

        Console.WriteLine($"Projected Coordinate: ({projectedCoordinate.X}, {projectedCoordinate.Y})");

    }

}

​