ChessServer.Commands.CommandFactory.CommandFactory C# (CSharp) Method

        private CommandFactory()
        {
            _commands =
            AppDomain.CurrentDomain.GetAssemblies()
            .SelectMany(assembly => assembly.GetTypes())
            .Where(type => typeof(CommandBase).IsAssignableFrom(type))
            .Where(type => !type.IsAbstract)
            .Select(type => (CommandBase) Activator.CreateInstance(type))
            .ToList();
        }