using System;
using System.Collections.Generic;
using System.Reflection;

public static class Terminal
{
    public const int 
    // ...
    TK_ENTER            = 0x28,
    TK_ESCAPE           = 0x29,
    TK_BACKSPACE        = 0x2A;
    // ...
}

public static class TerminalHelper
{
	private static Dictionary<string, string> m_lookup = new Dictionary<string, string>();
	
	static TerminalHelper()
	{
		foreach (FieldInfo f in typeof(Terminal).GetFields())
		{
			m_lookup[(m_lookup[f.Name] = f.GetValue(null).ToString())] = f.Name;
		}
	}
	
	public static string GetConstName(int code)
	{
		return m_lookup[code.ToString()]; // Error handling omitted.
	}
	
	public static int GetConstValue(string name)
	{
		return Convert.ToInt32(m_lookup[name]);
	}
}

public class Test
{
	public static void Main()
	{
		Console.WriteLine("Name of 0x29 is '{0}'", TerminalHelper.GetConstName(Terminal.TK_ESCAPE));
		Console.WriteLine("Value of 'TK_ESCAPE' is 0x{0:X}", TerminalHelper.GetConstValue("TK_ESCAPE"));
	}
}