asp.net - How to use theme and skin in a Button

Theme and skin in Button control
ButtonTheme.aspx

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

<!DOCTYPE html>

<script runat="server">
    
</script>

<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
    <title>How to use theme and skin in Button control</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <h2 style="color:Navy">Button Example: Theme</h2>
        <asp:Button 
             ID="Button1" 
             runat="server" 
             Text="Update Button"
             />
        <asp:Button 
             ID="Button2" 
             runat="server" 
             Text="Insert Button"
             />
    </div>
    </form>
</body>
</html>
Button.skin

<asp:Button 
     runat="server" 
     ForeColor="SaddleBrown"
     Font-Bold="true"
     Height="45"
     Font-Italic="true"
     Font-Size="Medium"
     />
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