Inserting string in a String Builder at mid position in C#

1. Forget Code
2. C#
3. Inserting string in a String Builder at mid position

using System;
using System.Text;

namespace forgetCode
{    
    class program
    {        
        public static void Main()
        {            

            StringBuilder sb1 = new StringBuilder("Time is gold");

            sb1.Insert(8, "nice and it is ");

            Console.WriteLine(sb1);
            
                           
        }
    }
}