how do you create an <h1> tag programmatically in ASP.NET?

You could also use:

<h1 runat="server" />

var h1 = new HtmlGenericControl("h1");
h1.InnerHtml = "header content";

You can use label or literal controls as shown below:

Label1.Text = "<h1>HI All</h1>";

string heading = "HI All";
Label1.Text = string.Format("<h1>{0}</h1>", heading);

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