Hypothetical C# Metaprogramming

gistfile1.cs

int MAX_ARGS = 10;

var arg_list = new string[MAX_ARGS]();
for (int i=0; i < MAX_ARGS; i++)
{
  arg_list[i] = "arg_" + i.ToString
  define_method(@"
    static Func<A, R> Memoize<A, R>(this Func<A, R> function)
    {
      var cache = new Dictionary<A, R>();
      return " + string.join(",", arg_list) + @" =>
      {
        R result;
        if (!cache.TryGetValue(argument, out result))
        {
          result = function(argument);
          cache[argument] = result;
        }
        return result;
      };
    }
    "
  )
}