using System;

using System.IO;

public class Program

{

    public static void Main()

    {

        // pathCombine tests

        Console.WriteLine("Test001 "+ pathCombine("/foo/bar.baz"));

        Console.WriteLine("Test002 "+ pathCombine("//foo/bar.baz"));

        Console.WriteLine("Test003 "+ pathCombine("\\foo/bar.baz"));

        Console.WriteLine("Test004 "+ pathCombine("foo/bar", "baz.bag"));

        Console.WriteLine("Test005 "+ pathCombine("foo\\bar", "baz.bag"));

        // Path.GetFileName tests

        Console.WriteLine("Test101 "+ Path.GetFileName("/foo/bar.baz"));

        Console.WriteLine("Test102 "+ Path.GetFileName("bar.baz"));

        Console.WriteLine("Test103 "+ Path.GetFileName(""));

        Console.WriteLine("Test104 "+ Path.GetFileName("\\foo\\bar.baz"));

        Console.WriteLine("Test105 "+ Path.GetFileName(@"\\server\share\foo.bar"));

        string doubleEscapedPath = "\\\\server\\share\\foo.bar";

        Console.WriteLine("Test106 "+ Path.GetFileName(doubleEscapedPath));

        // Path.GetDirectoryName tests

        Console.WriteLine("Test200 "+ pathUsingSubstring("foo\\bar.baz"));

        Console.WriteLine("Test201 "+ Path.GetDirectoryName("/foo/bar.baz"));

        Console.WriteLine("Test202 "+ Path.GetDirectoryName("foo/bar.baz"));

    }

    /*

     * Utility function that calls Path.Combine

     * and converts all backward slashes to forward slashes

     * as forward slashes work on both windows and linux

     */

    public static string pathCombine(params string[] paths)

    {

        return Path.Combine(paths).Replace('\\', '/');

    }

    public static string pathUsingSubstring(string path)

    {

        int index = path.LastIndexOf("\\");

        return path.Substring(0, index);        

    }

}

​