HTMLEditor Provider - How to write a custom provider for ASP.NET 2.0

using System;
using System.Configuration;
using System.Configuration.Provider;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

using SeaburyDesign;

namespace MyCompany1
{
    public class TextboxHTMLEditorProvider : HTMLEditorProvider
    {
        private TextBox textbox = new TextBox();

        public override System.Web.UI.Control HTMLEditor
        {
            get { return textbox; }
        }

        public override System.Web.UI.WebControls.Unit Width
        {
            get { return textbox.Width; }
            set { textbox.Width = value; }
        }

        public override System.Web.UI.WebControls.Unit Height
        {
            get { return textbox.Height; }
            set { textbox.Height = value; }
        }

        public override string Text
        {
            get { return textbox.Text; }
            set { textbox.Text = value; }
        }

        public override void Initialize(string name, System.Collections.Specialized.NameValueCollection config)
        {
            if ((config == null) || (config.Count == 0))
                throw new ArgumentNullException("You must supply a valid configuration dictionary.");

            if (string.IsNullOrEmpty(config["description"]))
            {
                config.Remove("description");
                config.Add("description", "TextboxHTMLEditorProvider");
            }

            //Let ProviderBase perform the basic initialization
            base.Initialize(name, config);

            //Perform feature-specific provider initialization here
            //A great deal more error checking and handling should exist here

            textbox.TextMode = TextBoxMode.MultiLine;
            textbox.Wrap = true;

            string text = config["text"];
            if (!String.IsNullOrEmpty(text))
                Text = text;
            else
                Text = "";

            string height = config["height"];
            if (!String.IsNullOrEmpty(height))
                Height = Unit.Pixel(Convert.ToInt32(height));
            else
                Height = Unit.Pixel(600);

            string width = config["width"];
            if (!String.IsNullOrEmpty(width))
                Width = Unit.Pixel(Convert.ToInt32(width));
            else
                Width = Unit.Pixel(800);
            
            ////Get the connection string
            //string connectionStringName = config["connectionStringName"];
            //if (String.IsNullOrEmpty(connectionStringName))
            //    throw new ProviderException("You must specify a connectionStringName attribute.");

            //ConnectionStringsSection cs =
            //    (ConnectionStringsSection)ConfigurationManager.GetSection("connectionStrings");
            //if (cs == null)
            //    throw new ProviderException("An error occurred retrieving the connection strings section.");

            //if (cs.ConnectionStrings[connectionStringName] == null)
            //    throw new ProviderException("The connection string could not be found in the connection strings section.");
            //else
            //    connectionString = cs.ConnectionStrings[connectionStringName].ConnectionString;

            //if (String.IsNullOrEmpty(connectionString))
            //    throw new ProviderException("The connection string is invalid.");
            //config.Remove("connectionStringName");

            ////Check to see if unexpected attributes were set in configuration
            //if (config.Count > 0)
            //{
            //    string extraAttribute = config.GetKey(0);
            //    if (!String.IsNullOrEmpty(extraAttribute))
            //        throw new ProviderException("The following unrecognized attribute was found in " + Name + "'s configuration: '" +
            //                                    extraAttribute + "'");
            //    else
            //        throw new ProviderException("An unrecognized attribute was found in the provider's configuration.");
            //}
        }
    }
}