Add project files.

Utility/HashUtility.cs

@@ -0,0 +1,14 @@
+using System.Security.Cryptography;
+using System.Text;
+
+namespace ConnectionsAPI.Utility
+{
+    public static class HashUtility
+    {
+        public static string CalculateMD5(string input)
+        {
+            byte[] hash = MD5.HashData(Encoding.UTF8.GetBytes(input));
+            return Convert.ToHexString(hash).Replace("-", string.Empty).ToLower();
+        }
+    }
+}