New: Implemented Torrent Download Clients: uTorrent, Transmission and Deluge. And several public and private Torrent Indexers.

src/MonoTorrent/HashAlgoFactory.cs

@@ -0,0 +1,41 @@
+using System;
+using System.Collections.Generic;
+using System.Security.Cryptography;
+
+namespace MonoTorrent
+{
+    public static class HashAlgoFactory
+    {
+        static Dictionary<Type, Type> algos = new Dictionary<Type, Type>();
+
+        static HashAlgoFactory()
+        {
+            Register<MD5, MD5CryptoServiceProvider>();
+            Register<SHA1, SHA1CryptoServiceProvider>();
+        }
+
+        public static void Register<T, U>()
+            where T : HashAlgorithm
+            where U : HashAlgorithm
+        {
+            Register(typeof(T), typeof(U));
+        }
+
+        public static void Register(Type baseType, Type specificType)
+        {
+            Check.BaseType(baseType);
+            Check.SpecificType(specificType);
+
+            lock (algos)
+                algos[baseType] = specificType;
+        }
+
+        public static T Create<T>()
+            where T : HashAlgorithm
+        {
+            if (algos.ContainsKey(typeof(T)))
+                return (T)Activator.CreateInstance(algos[typeof(T)]);
+            return null;
+        }
+    }
+}