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);
            
                           
        }
    }
}