Implemented Strategy Pattern

Tello Drone/MissionCommander.cs

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+using System;
+using System.Linq;
+using System.Security.Authentication.ExtendedProtection;
+
+namespace Tello_Drone
+{
+    public class MissionCommander : IMissionCommander
+    {
+        private readonly Drone _drone;
+
+        public MissionCommander(IDroneFactory droneFactory)
+        {
+            _drone = droneFactory.CreateDrone;
+        }
+
+        public void RunMission(IMissions mission)
+        {
+            SetUpDrone(3);
+            mission.Run(_drone);
+            TearDownDrone();
+        }
+
+        private void SetUpDrone(int retryCount)
+        {
+            var inCommandMode = false;
+            while (inCommandMode != true && retryCount > 0)
+            {
+                inCommandMode = _drone.Command();
+                retryCount--;
+            }
+            _drone.TakeOff();
+        }
+
+        private void TearDownDrone()
+        {
+            _drone.Land();
+        }
+
+    }
+}