Removed spaces from top-level directory names.

Spaces tend to cause annoyances in a Unix-style shell environment.
This change fixes that.

31_Depth_Charge/csharp/src/Program.cs

@@ -0,0 +1,47 @@
+using System;
+
+namespace DepthCharge
+{
+    class Program
+    {
+        static void Main(string[] args)
+        {
+            var random = new Random();
+
+            View.ShowBanner();
+
+            var dimension = Controller.InputDimension();
+            var maximumGuesses = CalculateMaximumGuesses();
+
+            View.ShowInstructions(maximumGuesses);
+
+            do
+            {
+                View.ShowStartGame();
+
+                var submarineCoordinates = PlaceSubmarine();
+                var trailNumber = 1;
+                var guess = (0, 0, 0);
+
+                do
+                {
+                    guess = Controller.InputCoordinates(trailNumber);
+                    if (guess != submarineCoordinates)
+                        View.ShowGuessPlacement(submarineCoordinates, guess);
+                }
+                while (guess != submarineCoordinates && trailNumber++ < maximumGuesses);
+
+                View.ShowGameResult(submarineCoordinates, guess, trailNumber);
+            }
+            while (Controller.InputPlayAgain());
+
+            View.ShowFarewell();
+
+            int CalculateMaximumGuesses() =>
+                (int)Math.Log2(dimension) + 1;
+
+            (int x, int y, int depth) PlaceSubmarine() =>
+                (random.Next(dimension), random.Next(dimension), random.Next(dimension));
+        }
+    }
+}