AjaxControlToolkit.Design.TwitterDesigner.GetDesignTimeHtml C# (CSharp) Method

        public override string GetDesignTimeHtml()
        {
            // grab original HTML for base designer so user can resize control at design time
            var originalHtml = base.GetDesignTimeHtml();
            var lastIdx = originalHtml.IndexOf("<div", 1);
            originalHtml = lastIdx > 0
                ? originalHtml.Substring(0, (originalHtml.IndexOf("<div", 1)))
                : originalHtml.Remove(originalHtml.Length - 6, 6);

            // remove all tabs and new lines
            originalHtml = originalHtml
                    .Replace("\r", String.Empty)
                    .Replace("\n", String.Empty)
                    .Replace("\t", String.Empty);

            string twitterHtml = null;
            try {
                switch(_twitter.Mode) {
                    case TwitterMode.Profile:
                        if(String.IsNullOrEmpty(_twitter.ScreenName))
                            throw new Exception("Please specify a screen name");
                        break;
                    default:
                        if(String.IsNullOrEmpty(_twitter.Search))
                            throw new Exception("Please specify a search keyword");
                        break;
                }

                var statuses = GenerateData();
                if(statuses.Count > 0)
                    twitterHtml = RenderLayout(statuses);
                else
                    twitterHtml = RenderEmptyData();
            }
            catch(Exception ex) {
                if(twitterHtml == null)
                    twitterHtml = "<div>" + ex.Message + "</div>";
            }

            var styleSheetUrl = ViewControl.Page.ClientScript.GetWebResourceUrl(
                this.GetType(), Constants.TwitterName + ".css");

            var styleSheetHtml = String.Format(@"<link href=""{0}"" rel=""stylesheet"" type=""text/css""/>",
                styleSheetUrl);

            return originalHtml + styleSheetHtml + twitterHtml + "</div>";
        }