/***********************************************************************************************************************

* Write a class that implments the interface below

************************************************************************************************************************/

using System;

using System.Collections;

using System.Collections.Generic;

​

interface IParTechUrlShortener

{

    /// <summary>

    /// This method takes in a long Url and returns a six character alpha-numeric code [A-Z][a-z][0-9]

    /// </summary>

    /// <param name="longUrl"></param>

    /// <returns></returns>

    string Shorten(string longUrl);

​

    /// <summary>

    /// This takes in a six character alpha-numeric code that was generated by "Shorten", and returns the original Url

    /// </summary>

    /// <param name="code"></param>

    /// <returns></returns>

    string Retrieve(string code);

}

​

​