Check if the content type is a hyperlink or not. Use FullPath if it is else use Path instead. Pass the content node to the function. Content types value set to 0, 16.

CheckIfHyperlink.cshtml

@using Contensis.Framework.Web
@{
  // Variables
  var link = Properties.link;
  
  <a href="@HyperlinkPath(link)">Link Text</a>
}
@functions {
  // Check if its a hyperlink or not
  public string HyperlinkPath(ContentNode property) {
    if(!String.IsNullOrEmpty(property.ToString())){
      if(property.Type == "Hyperlink") {
        return property.FullPath;
      } else {
        return property.Path;
      }   
    }
    
    return String.Empty;
  }
}