Ctor as an expression

    public class LambdaConstructorDelegate : IConstructorDelegate
    {
        public Func<object[], object> Create(ServiceContract serviceContract)
        {
            if (serviceContract.ConstructorDelegate != null)
            {
                return serviceContract.ConstructorDelegate;
            }

            var delegateParameter = Expression.Parameter(typeof(object[]));

            var infos = serviceContract.Constructor.GetParameters();

            var ctorParameters = new List<Expression>();
            for (int i = 0; i < infos.Length; i++)
            {
                var getElement = Expression.ArrayIndex(delegateParameter, Expression.Constant(i));
                var castElement = Expression.Convert(getElement, infos[i].ParameterType);
                ctorParameters.Add(castElement);
            }

            var lambda = Expression.Lambda<Func<object[], object>>(Expression.New(serviceContract.Constructor, ctorParameters), delegateParameter);
            var ctor = lambda.Compile();
            return ctor;
        }
    }