Initial Commit (w/ Ch1Duck first implementation)

Ch1Duck/Duck.cs

@@ -0,0 +1,19 @@
+namespace Ch1Duck;
+
+public abstract class Duck(IFlyBehaviour flyBehaviour, IQuackBehaviour quackBehaviour) {
+    public abstract void Display();
+
+    public void PerformFly() {
+        flyBehaviour.Fly();
+    }
+    
+    public void PerformQuack() {
+        quackBehaviour.Quack();
+    }
+}
+
+public class MallardDuck() : Duck(new FlyWithWings(), new NormalQuack()) {
+    public override void Display() {
+        Console.WriteLine("I'm a real Mallard duck");
+    }
+}