Add description and when to use strategy pattern

src/StrategyPattern/StrategyPatternExamples.cs

@@ -6,16 +6,43 @@ using System.Threading.Tasks;
 
 namespace StrategyPattern
 {
+    /// <summary>
+    /// Client
+    /// </summary>
     public class StrategyPatternExamples
     {
         public static void Run()
         {
+            Console.WriteLine(GetDescription());
+            Console.WriteLine(WhenToUse());
+            GoToNextStep();
             ShippingMotivatingExample.Run();
 
             ShippingWithStrategyExample.Run();
 
-            //TODO: use actions/funcs, add more examples
+            //TODO:add more examples
             //Show the switch moving problem
         }
+
+        private static string GetDescription()
+        {
+            return @"Strategy pattern (also known as the policy pattern) is a software design pattern 
+that enables an algorithm's behavior to be selected at runtime. The strategy pattern
+defines a family of algorithms,
+encapsulates each algorithm, and
+makes the algorithms interchangeable within that family.";
+        }
+
+        public static string WhenToUse()
+        {
+            return @"Whenever you start to use a switch statement you should ask yourself whether you can use Strategy Pattern instead. ";
+        }
+
+
+        private static void GoToNextStep()
+        {
+            Console.ReadKey();
+            Console.Clear();
+        }
     }
 }