using System;

public class Program

{

    public static void Main()

    {

        var emptyUri = string.Empty;

        IsWellFormedUriString(emptyUri);

        string nullUri = null;

        IsWellFormedUriString(nullUri);

    }

    private static void IsWellFormedUriString( string url){

        Console.WriteLine("IsWellFormedUriString => {0} , Uri = {1}" , Uri.IsWellFormedUriString(url, UriKind.Absolute), url);

    }

}