using System;

public delegate string GetError(string message);

public class Program

{

    public static void Main()

    {

        var missingName = GetError("MN");

        var notFoundError = GetError("NF");

        Console.WriteLine(missingName("Missong name"));

        Console.WriteLine(notFoundError("Not Found"));

        Console.WriteLine(missingName("Missong name 1"));

        Console.WriteLine(notFoundError("Not Found 2"));

    }

    public static string GetCode()

    {

        return "Code";

    }

    public static GetError GetError(string lastCode)

    {

         Console.WriteLine($"Last code {lastCode}");

        var code = $"{GetCode()}{lastCode}";

        return (message) => $"{code}:{message}";

    }

}