Explanation:

TextBox TextBox1 = FormView1.FindControl("TextBox1") as TextBox;

Add External Style Sheet to the Header
HtmlLink link = new HtmlLink();
link.Attributes.Add("type", "text/css");
link.Attributes.Add("rel", "stylesheet");
link.Attributes.Add("href", "~/main.css");
this.Header.Controls.Add(link);

Add Style attribute for the Page
Style style = new Style();
style.ForeColor = System.Drawing.Color.Navy;
style.BackColor = System.Drawing.Color.LightGray;
this.Header.StyleSheet.CreateStyleRule(style, null, "body");

Add Dynamic Meta tags to the Header
HtmlMeta meta = new HtmlMeta();
meta.Name = "keywords";
meta.Content = "Your keywords here";
this.Header.Controls.Add(meta);

meta = new HtmlMeta();
meta.Name = "robots";
meta.Content = "noindex";
this.Header.Controls.Add(meta);

meta = new HtmlMeta();
meta.Name = "date";
meta.Content = DateTime.Now.ToString("yyyy-MM-dd");
meta.Scheme = "YYYY-MM-DD";
this.Header.Controls.Add(meta);

Add Updated Page title to the Page
this.Header.Title = "Sue's little edream share with the world";

Also, use sitemap note for your title is a nice option:

Add Page title from the SiteMap Current Node
this.Header.Title =  SiteMap.CurrentNode.Title + " | " + SiteMap.CurrentNode.Description;

Note: All the above code should be used within page Page_Load event.