C# Right padding a string with spaces

Syntax

string string.PadRight(int totalWidth);

Program

using System;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            string str = "Hello world";

            Console.WriteLine("Demonstration of PadRight method");
            Console.WriteLine(str.PadRight(str.Length + 1) + "##########");
            Console.WriteLine(str.PadRight(str.Length + 2) + "##########");
            Console.WriteLine(str.PadRight(str.Length + 3) + "##########");
            Console.WriteLine(str.PadRight(str.Length + 4) + "##########");
            Console.WriteLine(str.PadRight(str.Length + 5) + "##########");
            
            Console.WriteLine();  
        }
    }
}

Output

Demonstration of PadRight method
Hello world ##########
Hello world  ##########
Hello world   ##########
Hello world    ##########
Hello world     ##########