How to use button control as HTML server control in asp.net

How to use button control as HTML server control in asp.net
HTMLServerControl.aspx

<%@ Page Language="C#" %>

<!DOCTYPE html>

<script runat="server">
    protected void Button1_ServerClick(object sender, System.EventArgs e)
    {
        Label1.Text = "Hi! " + TextBox1.Text;
    }
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
    <title>How to use button control as HTML server control in asp.net</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <h2 style="color:Navy; font-style:italic;">HTML Server Control Example: Using Button</h2>
        <asp:Label 
            ID="Label1" 
            runat="server"
            Font-Bold="true"
            ForeColor="DodgerBlue"
            Font-Size="Larger"
            >
        </asp:Label>
        <br /><br />
        <asp:Label 
            ID="Label2" 
            runat="server"
            Text="Name"
            Font-Bold="true"
            ForeColor="DeepPink"
            >
        </asp:Label>
        <asp:TextBox 
            ID="TextBox1"
            runat="server"
            BackColor="PaleGoldenrod"
            ForeColor="DeepPink"
            >
        </asp:TextBox>
        <br />
        <input 
            type="button" 
            id="Button1" 
            value="Submit" 
            runat="server" 
            onserverclick="Button1_ServerClick" 
            />
    </div>
    </form>
</body>
</html>
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