using System;

using System.Collections.Generic;

public class Program

{

        static Dictionary<ushort, String> Opcodes

    = new Dictionary<ushort, String>();

    public static void Main()

    {

         Opcodes.Add(0x2005, "Blocked: TD46 Tool");

        Console.WriteLine(isOpcodeAllowed(0x2005));

    }

    public static bool isOpcodeAllowed(ushort opcode) 

{ 

        Console.WriteLine("the opcode is {0}", opcode);

    //if opcode is 0x2005 and in Opcodes there is a key 0x2005 

    //then the next line will return true

    if (Opcodes.ContainsKey(opcode)) 

    { 

        Console.WriteLine("Opcodes contains key {0}", opcode);

           string text = Opcodes[opcode];

           //there is a string "Blocked: TD46 Tool" in the text variable 

           Console.WriteLine(text); //what do you see here? 

           return false; 

     }

     return true; 

 }

}

​