Add mediator examples

src/MediatorPattern/MediatorPatternExamples.cs

@@ -0,0 +1,50 @@
+using MediatorPattern.AirTrafficControl;
+using MediatorPattern.StockExchange;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+
+namespace MediatorPattern
+{    
+    public class MediatorPatternExamples
+    {
+        public static void Run()
+        {
+            Console.WriteLine(GetPatternDescription());
+            Console.WriteLine(GetActors());
+
+            //GoToNextStep();
+
+            //StockExchangeExample stockExample = new StockExchangeExample();
+            //stockExample.Run();
+
+            GoToNextStep();
+            AirTrafficControlExample airTraficExample = new AirTrafficControlExample();
+            airTraficExample.Run();
+        }
+
+        static string GetPatternDescription()
+        {
+            return @"Pattern description:
+With the mediator pattern, communication between objects is encapsulated with a mediator object. 
+Objects no longer communicate directly with each other, but instead communicate through the mediator. 
+This reduces the dependencies between communicating objects, thereby lowering the coupling.";
+        }
+
+        static string GetActors()
+        {
+            return @"Actors:
+Mediator: interface of the mediator, that defines what messages does it mediate between colleagues.
+Concrete Mediator: implementation of the interface
+Colleague: objects that communicate through the mediator
+";
+        }
+
+        private static void GoToNextStep()
+        {
+            Console.ReadKey();
+            Console.Clear();
+        }
+    }
+}