Functional level generation + moving the submarine

Subsurface/Map/Md5Hash.cs

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+using System.Security.Cryptography;
+using System.Text;
+using System.Text.RegularExpressions;
+using System.Xml.Linq;
+
+namespace Subsurface
+{
+    class Md5Hash
+    {
+        private string md5Hash;
+        private string shortHash;
+
+        public string MD5Hash
+        {
+            get 
+            {
+                return md5Hash;
+            }  
+        }
+
+        public string ShortHash
+        {
+            get 
+            { 
+                return shortHash;
+            }
+        }
+
+        public Md5Hash(string md5Hash)
+        {
+            this.md5Hash = md5Hash;
+
+            shortHash = GetShortHash(md5Hash);
+        }
+
+        public Md5Hash(XDocument doc)
+        {
+            string docString = Regex.Replace(doc.ToString(), @"\s+", "");
+            // step 1, calculate MD5 hash from input
+
+            MD5 md5 = MD5.Create();
+            byte[] inputBytes = Encoding.ASCII.GetBytes(docString);
+            byte[] hash = md5.ComputeHash(inputBytes);
+
+            // step 2, convert byte array to hex string
+            StringBuilder sb = new StringBuilder();
+            for (int i = 0; i < hash.Length; i++)
+            {
+                sb.Append(hash[i].ToString("X2"));
+            }
+
+            md5Hash = sb.ToString();
+
+            shortHash = GetShortHash(md5Hash);
+        }
+
+        private string GetShortHash(string fullHash)
+        {
+            return fullHash;
+        }
+    }
+}