Conversion in sqlserver when we cast or convert command

Remove whitespace from HTML

private static readonly Regex RegexBetweenTags = new Regex(@">(?! )\s+", RegexOptions.Compiled);
    private static readonly Regex RegexLineBreaks = new Regex(@"([\n\s])+?(?<= {2,})<", RegexOptions.Compiled);
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 protected override void Render(HtmlTextWriter writer)
    {
        using (HtmlTextWriter htmlwriter = new HtmlTextWriter(new System.IO.StringWriter()))
        {
            base.Render(htmlwriter);
            string html = htmlwriter.InnerWriter.ToString();
            writer.Write(RemoveWhitespaceFromHtml(html));
        }
    }
    public static string RemoveWhitespaceFromHtml(string html)
    {
        html = RegexBetweenTags.Replace(html, ">");
        html = RegexLineBreaks.Replace(html, "<");

        return html.Trim();
    }