using System;

​

public class Program

{

    public static void Main()

    {

        try

        {

            var uri = new Uri("");

        }

        catch (Exception ex)

        {

            Console.WriteLine("Empty: " + ex.Message);

        }

​

        try

        {

            var uri = new Uri(null);

        }

        catch (Exception ex)

        {

            Console.WriteLine("Null: " + ex.Message);

        }

​

        try

        {

            var uri = new Uri("   http://.sinch.com   ");

        }

        catch (Exception ex)

        {

            Console.WriteLine("Invalid hostname: " + ex.Message);

        }

​

        var uri2 = new Uri("   http://sinch.com   ");

        Console.WriteLine("Trimmed: " + uri2.ToString());

    }

}