Adding Html from Code Behind in Asp.net

Answer 1

Don't add that child control to the panel, add it to the control that should be the parent:

HtmlGenericControl divcontrol = new HtmlGenericControl();
divcontrol.Attributes["class"] = "sxro sx1co";
divcontrol.TagName = "div";
pnlUserSearch.Controls.Add(divcontrol);

Label question = new Label();
questionDescription.Text = "text";
divcontrol.Controls.Add(question); // add to the new div, not to the panel