added better db migration support than what Subsonic provides out of the box.

Migrator.net/Migrator/MigrationComparer.cs

@@ -0,0 +1,43 @@
+#region License
+//The contents of this file are subject to the Mozilla Public License
+//Version 1.1 (the "License"); you may not use this file except in
+//compliance with the License. You may obtain a copy of the License at
+//http://www.mozilla.org/MPL/
+//Software distributed under the License is distributed on an "AS IS"
+//basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
+//License for the specific language governing rights and limitations
+//under the License.
+#endregion
+
+using System;
+using System.Collections.Generic;
+using Migrator.Framework;
+
+namespace Migrator
+{
+	/// <summary>
+	/// Comparer of Migration by their version attribute.
+	/// </summary>
+	public class MigrationTypeComparer : IComparer<Type>
+	{
+		private readonly bool _ascending = true;
+		
+		public MigrationTypeComparer(bool ascending)
+		{
+			_ascending = ascending;
+		}
+
+        public int Compare(Type x, Type y)
+		{
+			MigrationAttribute attribOfX = (MigrationAttribute) Attribute.GetCustomAttribute(x, typeof(MigrationAttribute));
+			MigrationAttribute attribOfY = (MigrationAttribute) Attribute.GetCustomAttribute(y, typeof(MigrationAttribute));
+			
+			if (_ascending)
+				return attribOfX.Version.CompareTo(attribOfY.Version);
+			else
+				return attribOfY.Version.CompareTo(attribOfX.Version);
+			
+			
+		}
+	}
+}