The quotes do solve the problem!
Thank you for the quick and useful reply!
Also instead of p-tag I've used the span-tag, thank you!

Hi all,
I'm using NGalleryItem with the NLabelElement. These controls are great, but I'm stick with the showing html in the Text attribute of the NLabelElement.
This control shows the html text like "<b>Name</b><br/>Id" very well, but if I try to set the value of the attribute to "<p id={1} path=\"{2}\"><b>Name: {0}</b><br />Polarity: {3}</p>" the control shows this plain text on the form rather than rendered html.
I'm using the control like this:

var item = new NGalleryItem();
item.Label.Text = string.Format("<p id={1} path=\"{2}\"><b>Name: {0}</b><br />Polarity: {3}</p>",
    Name,   // name
      Id,   // dictionary item id
      FilePath,   // rda-file path
      Polarity);

could anyone help me?
what am I doing wrong?