Switch to Umbraco.TypedContent and then it will work. Also you should use Umbraco.TypedMedia, Umbraco.TypedMember etc

Dynamic objects are just that - dynamic. Meaning that they can be just about anything you want. That is why you don't get any intellisense (what is it supposed to 'sense' when it can be anything?).

Instead of 'Umbraco.Content(id)' use 'Umbraco.TypedContent(id)' - that way, intellisense will know what object type you are using.

Hope that answers your question :)

Where do i do this switch?

Change

var startNode = Umbraco.Content(startNodeID);

Into

var startNode = Umbraco.TypedContent(startNodeID);

That will give you full intellisense on that object.

You have var startNode = Umbraco.Content(startNodeID); change to var startNode = Umbraco.TypedContent(startNodeID);

Thanks. 

So, i used to have @page.sliderCaption (which is a textbox custom property). But now i have changed accordingly, @page.sliderCaption does not work anymore and I have to use page.GetPropertyValue("sliderCaption"). Why is that?

That is dynamics vs strongly typed.

Dynamics is concise in that you can do CurrentPage.propertyName but Strongly Typed gives you intellisense but you cannot use dynamic property names.

Something you could consider is the Zbu.ModelsBuilder package which generates strongly typed models from your document types meaning you can do Model.Content.PropertyName and have Intellisense!

There is a video demo of using it here

Getting there :-)

So would this be a correct way of coding this, or am i taking some unneeded detours?

   @inherits Umbraco.Web.Macros.PartialViewMacroPage


@*
    === Macro Parameters To Create ===
    Alias:nodeId Name:Node ID    Type:Content Picker
*@


@{

    var startNodeID = Model.MacroParameters["carrouselNodeId"];
}


@if (startNodeID != null)
{
    @* Get the start node as a dynamic node *@
    var startNode = Umbraco.TypedContent( startNodeID);

    if (startNode.Children.Where("Visible").Any())
    {

<!-- Slider -->
    <div id="slider-block">
    <div id="slider-holder">
    <div id="slider">


            @foreach (var page in startNode.Children.Where("Visible"))
            {
                var sliderImageUrl = string.Empty;
                var caption = string.Empty;
                var linkedPageUrl = string.Empty;

                // get caption
                caption = (string)page.GetPropertyValue("sliderCaption");

                // get image url
                if (page.HasValue("sliderImage"))
                {
                    sliderImageUrl = page.GetCropUrl("sliderImage", "Carrousel Afbeelding");
                }

                if (page.HasValue("sliderLink"))
                {
                    var pageToLink = Umbraco.TypedContent(page.GetPropertyValue("sliderLink"));
                    linkedPageUrl = @pageToLink.Url;

                    <a href="@linkedPageUrl">
                        <img src="@sliderImageUrl" title="@caption" alt="@caption" />
                    </a>
                }
                else
                {
                    <img src="@sliderImageUrl" title="@caption" alt="@caption" />
                }

            }


    </div>
    </div>
    </div>
<!-- ENDS Slider -->    


          }

}

Generally pretty good, I have made a few minor tweaks below:

@inherits Umbraco.Web.Macros.PartialViewMacroPage

@{
    var startNodeId = Model.MacroParameters["carrouselNodeId"];

    if (startNodeId != null)
    {
        @* Get the start node as a dynamic node *@
        var startNode = Umbraco.TypedContent(startNodeId);

        if (startNode.Children.Where("Visible").Any())
        {

            <!-- Slider -->
            <div id="slider-block">
                <div id="slider-holder">
                    <div id="slider">


                        @foreach (var page in startNode.Children.Where("Visible"))
                        {
                            var sliderImageUrl = string.Empty;

                            // get caption
                            var caption = page.GetPropertyValue<string>("sliderCaption");

                            // get image url
                            if (page.HasValue("sliderImage"))
                            {
                                sliderImageUrl = page.GetCropUrl("sliderImage", "Carrousel Afbeelding");
                            }

                            if (page.HasValue("sliderLink"))
                            {
                                var pageToLink = Umbraco.TypedContent(page.GetPropertyValue("sliderLink"));
                                var linkedPageUrl = pageToLink.Url;

                                <a href="@linkedPageUrl">
                                    <img src="@sliderImageUrl" title="@caption" alt="@caption" />
                                </a>
                            }
                            else
                            {
                                <img src="@sliderImageUrl" title="@caption" alt="@caption" />
                            }

                        }

                    </div>
                </div>
            </div>
            <!-- ENDS Slider -->
    }
}

is working on a reply...