Own IoC Container

iocContainer.cs

public class MyContainer
{
    private readonly Dictionary<Type, Type> _registrations;

    public MyContainer()
    {
        _registrations = new Dictionary<Type, Type>();
    }

    public void Register<T, TS>()
    {
        _registrations.Add(typeof(T), typeof(TS));
    }

    public T Get<T>()
    {
        return (T)GetObject(typeof(T));
    }

    private object GetObject(Type parameterType)
    {
        if (!_registrations.ContainsKey(parameterType)) throw new Exception("Type not registered");

        var concreteType = _registrations[parameterType];

        var constructorParams = GetConstructorParams(concreteType);

        return Activator.CreateInstance(concreteType, constructorParams.ToArray());
    }

    private IEnumerable<object> GetConstructorParams(Type concreteType)
    {
        var constructor = concreteType.GetConstructors().Single();

        var cparams = constructor.GetParameters();

        foreach (var parameterInfo in cparams)
        {
            yield return GetObject(parameterInfo.ParameterType);
        }
    }
}