Xamarin IOS C# NSAttributedString

AttributedTextToHTML.cs

//https://forums.xamarin.com/discussion/18460/uitextview-and-html
//https://gist.github.com/adrianstevens/933d66faaea83e165f5f

using System;
using MonoTouch.UIKit;
using MonoTouch.Foundation;

namespace YourNameSpaceGoesHere
{
  public class AttributedTextToHTML
  {
    public AttributedTextToHTML ()
    {
    }
    public static NSAttributedString GetAttributedStringFromHtml(NSString html)
    {
        NSData htmlData = html.DataUsingEncoding (NSStringEncoding.UTF8);
        NSAttributedStringDocumentAttributes importParams = new NSAttributedStringDocumentAttributes();
        importParams.DocumentType = NSDocumentType.HTML;
        NSError error = new NSError ();
        error = null;
        NSDictionary dict = new NSDictionary ();

        var attrString = new NSAttributedString (htmlData, importParams, out dict, ref error);
        return attrString;
    }

    public static NSAttributedString GetAttributedStringFromHtml(NSUrl html)
    {
        //  NSData htmlData = html.DataUsingEncoding (NSStringEncoding.UTF8);
        NSAttributedStringDocumentAttributes importParams = new NSAttributedStringDocumentAttributes();
        importParams.DocumentType = NSDocumentType.HTML;
        NSError error = new NSError ();
        error = null;
        NSDictionary dict = new NSDictionary ();
        var attrString = new NSAttributedString (html, ref error);

        //var attrString = new NSAttributedString (htmlData, importParams, out dict, ref error);
        return attrString;
    }

    /// <summary>
    /// Gets the HTML from attributed string.
    /// </summary>
    /// <returns>The HTML from attributed string.</returns>
    /// <param name="attributedString">Attributed string.</param>
    public static NSString GetHTMLFromAttributedString(NSAttributedString attributedString)
    {
        NSAttributedStringDocumentAttributes attr = new NSAttributedStringDocumentAttributes ();
        attr.DocumentType = NSDocumentType.HTML;
        NSDictionary exportParams = new NSDictionary ();
        //  NSData htmlData = new NSData ();
        NSError error = new NSError ();
        var attrString = new NSAttributedString (attributedString.Value, attr, ref error);

        var retString = new NSString (attrString.Value);
        //new NSRange (0, 100);
        //NSString retString = new NSString(
        //NSString retString = new NSString (htmlData, NSStringEncoding.UTF8);
        return retString;

        // var attributes = new NSAttributedStringDocumentAttributes ();
        //  attributes.DocumentType = NSDocumentType.HTML;
        //attributes.StringEncoding = NSStringEncoding.UTF8;
        //var error = new NSError ();
        //var htmlString = new NSAttributedString (text, attributes, ref error);
        //return htmlString;

    }
  }
}