Hi I would like to split the Id's from selected nodes in the MNTP like so:

<div class="item" data-ids="1001 1002 1003"><a href="#"></a></div>

Right now my code looks like this

@foreach(var item in CurrentPage.Children().Where("Visible")){

    var optionList = item.kompetencer.ToString().Split(new string[] { "," }, StringSplitOptions.RemoveEmptyEntries);
    var optionCollection = Umbraco.Content(optionList);

    var list = new List<string>();

    foreach (var node in optionCollection){
      list.Add(node.Id.ToString());
    }

    <div class="item" data-ids="@list"><a href="#">@item.Name</a></div>

  }

And it gives me the following output

<div class="item" data-ids="System.Collections.Generic.List`1[System.String]"><a href="#">Test Reference</a></div>

Hope some one can give me some directions :)