using System;

using System.Linq;

public class Program

{

    public static void Main()

    {

        var str = "Joe Doe Doe , owner business".Replace(",", "").Split(new[] { ' ' }, StringSplitOptions.RemoveEmptyEntries);

​

        string LastName = str.Length > 0 ? str[0] : "";

        string Name = str.Length > 1 ? str[1] : "";

        string FatherName = str.Length > 2 ? str[2] : "";

        string Positions = string.Join(" ", str.Reverse().Take(str.Count() - 3).ToArray());

​

        Console.WriteLine(LastName);

        Console.WriteLine(Name);

        Console.WriteLine(FatherName);

        Console.WriteLine(Positions.Split().Reverse());

    }

}