Example REPL | not the best way to write a REPL

REPL.cs

using System;
using Microsoft.ClearScript;
using Microsoft.ClearScript.V8;

namespace v8repl
{
    class REPL
    {
        /* v8 engine outside main loop */
        private V8ScriptEngine v8 = new V8ScriptEngine();
        private bool running = false; /* */

        /* keep reading input from stdin until running = false */
        public void Start()
        {
            running = true;
            while (running)
            {
                string line = Console.ReadLine();

                if (line.Equals("kill"))
                {
                    running = false; /* causes this while loop to stop */
                }
                else {
                    Run(line);
                }
            }
        }

        /* method to read and evaluate JavaScript file */
        public void LoadFile(string inputFile)
        {
            v8.Evaluate(
                System.IO.File.ReadAllText(inputFile)
            );
        }
        
        /* safely evaluate code like we did before */
        public void Run(string line)
        {
            try
            {
                v8.Evaluate(line);
            }
            catch (System.Exception e)
            {
                Console.Error.WriteLine(e.Message);
            }
        }

        /* this allows us to get current instance */
        public V8ScriptEngine GetInstance()
        {
            return v8;
        }
    }
}