Initial Commit (w/ Ch1Duck first implementation)

Ch1Duck/Quack.cs

@@ -0,0 +1,23 @@
+namespace Ch1Duck;
+
+public interface IQuackBehaviour {
+    void Quack();
+}
+
+public class NormalQuack: IQuackBehaviour {
+    public void Quack() {
+        Console.WriteLine("Quack");
+    }
+}
+
+public class MuteQuack : IQuackBehaviour {
+    public void Quack() {
+        Console.WriteLine("<< Silence >>");
+    }
+}
+
+public class Squeak: IQuackBehaviour {
+    public void Quack() {
+        Console.WriteLine("Squeak");
+    }
+}