Engine and CommandInterpreter

using CommandPattern.Core.Contracts;
using System;
using System.Linq;
using System.Reflection;

namespace CommandPattern.Core
{
    public class Engine : IEngine
    {
        private readonly ICommandInterpreter commandInterpreter;
        public Engine(ICommandInterpreter command)
        {
            this.commandInterpreter = command;
        }
        public void Run()
        {
            while (true)
            {
                var input = Console.ReadLine();
                var result = this.commandInterpreter.Read(input);
                Console.WriteLine(result);
            }
        }
    }
    public class CommandInterpreter : ICommandInterpreter
    {
        public string Read(string args)
        {
            var data = args.Split(" ", StringSplitOptions.RemoveEmptyEntries);
            var com = (data[0]+ "Command").ToLower();
            var comArgs = data.Skip(1).ToArray();
            var type = Assembly.GetCallingAssembly().GetTypes().FirstOrDefault(x => x.Name.ToLower() == com);
            if (type == null) throw new ArgumentException("Invalid command type!");
            var instance = Activator.CreateInstance(type) as ICommand;
            if (instance == null) throw new ArgumentException("Invalid command type!");
            var result = instance.Execute(comArgs);
            return result;
        }
    }
}