Initial Commit (w/ Ch1Duck first implementation)

Ch1Duck/Fly.cs

@@ -0,0 +1,17 @@
+namespace Ch1Duck;
+
+public interface IFlyBehaviour {
+    void Fly();
+}
+
+public class FlyWithWings: IFlyBehaviour {
+    public void Fly() {
+        Console.WriteLine("I'm flying!");
+    }
+}
+
+public class FlyNoWay: IFlyBehaviour {
+    public void Fly() {
+        Console.WriteLine("I can't fly");
+    }
+}