Add C# implementaion of 86 Target

86 Target/csharp/Target/Game.cs

@@ -0,0 +1,89 @@
+using System;
+
+namespace Target
+{
+    internal class Game
+    {
+        private readonly FiringRange _firingRange;
+        private int _shotCount;
+
+        private Game(FiringRange firingRange)
+        {
+            _firingRange = firingRange;
+        }
+
+        public static void Play(FiringRange firingRange) => new Game(firingRange).Play();
+
+        private void Play()
+        {
+            var target = _firingRange.TargetPosition;
+            Console.WriteLine(target.GetBearing());
+            Console.WriteLine($"Target sighted: approximate coordinates:  {target}");
+
+            while (true)
+            {
+                Console.WriteLine($"     Estimated distance: {target.EstimateDistance()}");
+                Console.WriteLine();
+
+                var explosion = Shoot();
+
+                if (explosion.IsTooClose)
+                {
+                    Console.WriteLine("You blew yourself up!!");
+                    return;
+                }
+
+                Console.WriteLine(explosion.GetBearing());
+
+                if (explosion.IsHit)
+                {
+                    ReportHit(explosion.DistanceToTarget);
+                    return;
+                }
+
+                ReportMiss(explosion);
+            }
+        }
+
+        private Explosion Shoot()
+        {
+            var input = Input.ReadNumbers("Input angle deviation from X, angle deviation from Z, distance", 3);
+            _shotCount++;
+            Console.WriteLine();
+
+            return _firingRange.Fire(Angle.InDegrees(input[0]), Angle.InDegrees(input[1]), input[2]);
+        }
+
+        private void ReportHit(float distance)
+        {
+            Console.WriteLine();
+            Console.WriteLine($" * * * HIT * * *   Target is non-functional");
+            Console.WriteLine();
+            Console.WriteLine($"Distance of explosion from target was {distance} kilometers.");
+            Console.WriteLine();
+            Console.WriteLine($"Mission accomplished in {_shotCount} shots.");
+        }
+
+        private void ReportMiss(Explosion explosion)
+        {
+            ReportMiss(explosion.FromTarget);
+            Console.WriteLine($"Approx position of explosion:  {explosion.Position}");
+            Console.WriteLine($"     Distance from target = {explosion.DistanceToTarget}");
+            Console.WriteLine();
+            Console.WriteLine();
+            Console.WriteLine();
+        }
+
+        private void ReportMiss(Offset targetOffset)
+        {
+            ReportMiss(targetOffset.DeltaX, "in front of", "behind");
+            ReportMiss(targetOffset.DeltaY, "to left of", "to right of");
+            ReportMiss(targetOffset.DeltaZ, "above", "below");
+        }
+
+        private void ReportMiss(float delta, string positiveText, string negativeText) =>
+            Console.WriteLine(delta >= 0 ? GetOffsetText(positiveText, delta) : GetOffsetText(negativeText, -delta));
+
+        private static string GetOffsetText(string text, float distance) => $"Shot {text} target {distance} kilometers.";
+    }
+}