Using Lambda Expressions

Program.cs

using System;

namespace create_implement_events_callbacks
{
    class Program
    {
        public delegate int Calculate(int x, int y);

        public delegate void ShowMessage(string message);
        static void Main(string[] args)
        {
            Calculate multiCastingCalc = (x, y) => x + y;
            multiCastingCalc += (x, y) => x * y;
            
            Console.WriteLine(multiCastingCalc(3, 4));

            ShowMessage aMessage = message =>
            {
                var phrase = $"The message is {message}";
                Console.WriteLine(phrase);
            };

            aMessage("Luis is a cool guy!");
            Console.ReadKey();
        }
    }
}