public class Strategy
{
... etc
}

public class FooStrategy : Strategy
{
... etc
}

public class BarStrategy : Strategy
{
... etc
}

container.RegisterType<IStrategy, FooStrategy>("FooStrategy");
container.RegisterType<IStrategy, BarStrategy>("BarStrategy");

var foo = container.Resolve<IStrategy>("FooStrategy");
Assert.IsTrue(foo.GetType() == typeof (FooStrategy));

container.RegisterTypes(AllClasses.FromLoadedAssemblies().Where(t => typeof(Strategy).IsAssignableFrom(t)));