Simplify Chemist (C#) folder structure

24_Chemist/csharp/Program.cs

@@ -0,0 +1,49 @@
+using System;
+const int maxLives = 9;
+
+WriteCentred("Chemist");
+WriteCentred("Creative Computing, Morristown, New Jersey");
+Console.WriteLine(@"
+
+
+The fictitious chemical kryptocyanic acid can only be
+diluted by the ratio of 7 parts water to 3 parts acid.
+If any other ratio is attempted, the acid becomes unstable
+and soon explodes.  Given the amount of acid, you must
+decide who much water to add for dilution.  If you miss
+you face the consequences.
+");
+
+var random = new Random();
+int livesUsed = 0;
+while (livesUsed < maxLives)
+{
+    int krypto = random.Next(1, 50);
+    double water = krypto * 7.0 / 3.0;
+
+    Console.WriteLine($"{krypto} Liters of kryptocyanic acid.  How much water?");
+    double answer = double.Parse(Console.ReadLine());
+
+    double diff = Math.Abs(answer - water);
+    if (diff <= water / 20)
+    {
+        Console.WriteLine("Good job! You may breathe now, but don't inhale the fumes"!);
+        Console.WriteLine();
+    }
+    else
+    {
+        Console.WriteLine("Sizzle!  You have just been desalinated into a blob\nof quivering protoplasm!");
+        Console.WriteLine();
+        livesUsed++;
+
+        if (livesUsed < maxLives)
+            Console.WriteLine("However, you may try again with another life.");
+    }
+}
+Console.WriteLine($"Your {maxLives} lives are used, but you will be long remembered for\nyour contributions to the field of comic book chemistry.");
+
+static void WriteCentred(string text)
+{
+    int indent = (Console.WindowWidth + text.Length) / 2;
+    Console.WriteLine($"{{0,{indent}}}", text);
+}