using System;

using System.Linq;

​

public class Program

{

    public static void Main(string[] args)

    {

        const string text =

            "41.673993158 0.000000000 258.436256\r\n" +

            "41.673992499 -0.000001364 258.462068\r\n" +

            "41.673991841 -0.000002700 258.487880";

​

        var nums = text

            .Split(new[] {" ", "\r\n"}, StringSplitOptions.RemoveEmptyEntries)

            .Select(double.Parse)

            .ToArray();

​

        foreach (var num in nums)

        {

            Console.WriteLine(num);

        }

    }

}