Consider the program:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main()
        {
            String str1 = "This is a sample string";
            String str2;
           
            
            str2 = str1.PadLeft(30, '#');

            Console.WriteLine("String after left padding:(" + str2+")");

        }
    }
  
}

Output

String after left padding:(#######This is a sample string)

In above program we used ‘#’ character to pad string from left, and string length after padding will be 30 characters.