Ch3Beverage: Complete first part of the exercise

Ch3Beverage/Program.cs

@@ -1,3 +1,24 @@
 // See https://aka.ms/new-console-template for more information
 
-Console.WriteLine("Hello, World!");
+using Ch3Beverage;
+
+
+Beverage beverage = new Espresso();
+beverage.Print();
+Beverage beverage2 = new DarkRoast();
+beverage2 = new Mocha(new Mocha(beverage2));
+beverage2 = new Whip(beverage2);
+beverage2.Print();
+Beverage beverage3 = new HouseBlend();
+beverage3 = new Soy(beverage3);
+beverage3 = new Mocha(beverage3);
+beverage3 = new Whip(beverage3);
+beverage3.Print();
+
+public static class BeveragePrintExtension {
+    // Bored, I've mode an extension method to easily print a Beverage. LOL.
+    // Because Bored, I didn't wrap this in a namespace... in real code it's necessary.
+    public static void Print(this Beverage value) {
+        Console.WriteLine($"{value.Description} ${value.Cost()}");
+    }
+}