using System;

public class Program

{

    public static void Main()

    {

        var pathNoSep = System.IO.Path.Combine("1", "2", "3");

        var pathCharSep = System.IO.Path.Combine("1", "2", System.IO.Path.DirectorySeparatorChar.ToString(), "3");

        var pathSlashSep = System.IO.Path.Combine("1", "2", "\\", "3");

        Console.WriteLine(pathNoSep);

        Console.WriteLine(pathCharSep);

        Console.WriteLine(pathSlashSep);

    }

}