using System;

using System.Text.RegularExpressions;

​

public class Program

{

    public static void Main()

    {

        var url = "https://fptshop.com.vn/Content/Publishing/js/sourb31c.csseutm.minss?v=01062";

        var uri = new Uri(url);

        var aa = Regex.Match(uri.AbsolutePath , "(\\.css)|(\\.js)$");

        Console.WriteLine(aa.Length);

    }

}