CS_0019_String_Builder

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

namespace string1

{

    class Program

    {

        static void Main(string[] args)

        {

            StringBuilder myString = new StringBuilder();

            for (int i = 0; i < 100; i++)

            {

                myString.Append("---");

                myString.Append(i);

            }

            Console.WriteLine(myString.ToString());

            Console.ReadLine();

        }

    }

}