using System;

public class Program

{

    public static void Main()

    {

        var uriString = "/en-us/free/#12-months-free";

        var isWellFormed = Uri.IsWellFormedUriString(uriString, UriKind.RelativeOrAbsolute);

        Console.WriteLine("'{0}' is weel formed: {1}", uriString, isWellFormed);

    }

}